./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:51:36,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:51:37,029 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:51:37,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:51:37,044 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:51:37,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:51:37,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:51:37,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:51:37,068 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:51:37,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:51:37,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:51:37,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:51:37,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:51:37,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:51:37,075 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:51:37,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:51:37,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:51:37,076 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:51:37,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:51:37,076 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:51:37,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:51:37,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:51:37,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:51:37,078 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:51:37,078 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:51:37,078 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:51:37,078 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:51:37,079 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:51:37,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:51:37,080 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:51:37,081 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:51:37,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:51:37,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:51:37,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:51:37,081 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:51:37,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:51:37,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:51:37,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:51:37,082 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:51:37,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:51:37,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:51:37,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:51:37,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:51:37,084 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:51:37,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:51:37,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:51:37,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:51:37,350 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:51:37,350 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:51:37,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 21:51:37,422 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:51:37,423 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:51:37,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 21:51:38,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:51:38,786 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:51:38,787 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 21:51:38,803 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e737bc7fa/7400f196efde420d8f69d5441ac9461c/FLAGe807af627 [2024-06-27 21:51:38,813 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e737bc7fa/7400f196efde420d8f69d5441ac9461c [2024-06-27 21:51:38,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:51:38,815 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:51:38,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:51:38,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:51:38,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:51:38,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:51:37" (1/2) ... [2024-06-27 21:51:38,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c26bde4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:51:38, skipping insertion in model container [2024-06-27 21:51:38,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:51:37" (1/2) ... [2024-06-27 21:51:38,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34628b91 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:51:38, skipping insertion in model container [2024-06-27 21:51:38,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:51:38" (2/2) ... [2024-06-27 21:51:38,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c26bde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:38, skipping insertion in model container [2024-06-27 21:51:38,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:51:38" (2/2) ... [2024-06-27 21:51:38,826 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:51:38,849 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:51:38,850 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 21:51:38,850 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 21:51:38,850 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ! multithreaded || (((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) [2024-06-27 21:51:38,850 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:51:38,850 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 21:51:38,882 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:51:39,047 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 21:51:39,204 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:51:39,215 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 21:51:39,256 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:51:39,306 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:51:39,340 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:51:39,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39 WrapperNode [2024-06-27 21:51:39,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:51:39,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:51:39,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:51:39,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:51:39,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,377 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 21:51:39,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:51:39,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:51:39,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:51:39,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:51:39,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,391 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,403 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:51:39,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,409 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:51:39,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:51:39,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:51:39,416 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:51:39,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (1/1) ... [2024-06-27 21:51:39,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:51:39,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:51:39,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:51:39,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:51:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:51:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:51:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:51:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:51:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:51:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:51:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:51:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:51:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:51:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:51:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:51:39,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:51:39,495 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:51:39,624 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:51:39,626 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:51:39,838 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:51:39,838 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:51:39,941 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:51:39,943 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:51:39,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:51:39 BoogieIcfgContainer [2024-06-27 21:51:39,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:51:39,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:51:39,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:51:39,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:51:39,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:51:37" (1/4) ... [2024-06-27 21:51:39,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327a6142 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:51:39, skipping insertion in model container [2024-06-27 21:51:39,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:51:38" (2/4) ... [2024-06-27 21:51:39,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327a6142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:51:39, skipping insertion in model container [2024-06-27 21:51:39,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:51:39" (3/4) ... [2024-06-27 21:51:39,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327a6142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:51:39, skipping insertion in model container [2024-06-27 21:51:39,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:51:39" (4/4) ... [2024-06-27 21:51:39,956 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 21:51:39,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:51:39,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:51:39,972 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:51:40,033 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:51:40,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 21:51:40,105 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 21:51:40,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:51:40,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 21:51:40,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 21:51:40,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 21:51:40,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:51:40,131 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;@1e10702b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:51:40,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 21:51:40,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:51:40,138 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:51:40,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:51:40,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:40,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:51:40,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:40,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash 209466946, now seen corresponding path program 1 times [2024-06-27 21:51:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640528737] [2024-06-27 21:51:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:40,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:40,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640528737] [2024-06-27 21:51:40,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640528737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:40,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:40,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:51:40,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445436487] [2024-06-27 21:51:40,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:40,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:51:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:51:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:51:40,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-06-27 21:51:40,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:40,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:40,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-06-27 21:51:40,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:40,808 INFO L124 PetriNetUnfolderBase]: 704/1197 cut-off events. [2024-06-27 21:51:40,809 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 21:51:40,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 1197 events. 704/1197 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6790 event pairs, 395 based on Foata normal form. 1/1134 useless extension candidates. Maximal degree in co-relation 2314. Up to 1072 conditions per place. [2024-06-27 21:51:40,824 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 31 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-27 21:51:40,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 189 flow [2024-06-27 21:51:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:51:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:51:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-27 21:51:40,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7318840579710145 [2024-06-27 21:51:40,838 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 101 transitions. [2024-06-27 21:51:40,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 189 flow [2024-06-27 21:51:40,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:40,846 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-27 21:51:40,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 21:51:40,852 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 21:51:40,853 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-27 21:51:40,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:40,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:40,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:51:40,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:40,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash -564969073, now seen corresponding path program 1 times [2024-06-27 21:51:40,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:40,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966533357] [2024-06-27 21:51:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:40,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966533357] [2024-06-27 21:51:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966533357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:41,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:41,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:51:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216736155] [2024-06-27 21:51:41,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:51:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:51:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:51:41,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:41,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:41,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:41,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:41,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:41,317 INFO L124 PetriNetUnfolderBase]: 868/1434 cut-off events. [2024-06-27 21:51:41,317 INFO L125 PetriNetUnfolderBase]: For 275/299 co-relation queries the response was YES. [2024-06-27 21:51:41,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3211 conditions, 1434 events. 868/1434 cut-off events. For 275/299 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8073 event pairs, 420 based on Foata normal form. 6/1428 useless extension candidates. Maximal degree in co-relation 3199. Up to 1289 conditions per place. [2024-06-27 21:51:41,329 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 41 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-06-27 21:51:41,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 266 flow [2024-06-27 21:51:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:51:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:51:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 21:51:41,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2024-06-27 21:51:41,335 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 131 transitions. [2024-06-27 21:51:41,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 266 flow [2024-06-27 21:51:41,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:51:41,338 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 152 flow [2024-06-27 21:51:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 21:51:41,340 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2024-06-27 21:51:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 152 flow [2024-06-27 21:51:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:41,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:41,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:51:41,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:41,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1769359890, now seen corresponding path program 1 times [2024-06-27 21:51:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220030674] [2024-06-27 21:51:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220030674] [2024-06-27 21:51:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220030674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:41,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:41,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:51:41,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703807735] [2024-06-27 21:51:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:41,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:51:41,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:51:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:51:41,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:41,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:41,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:41,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:41,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:41,738 INFO L124 PetriNetUnfolderBase]: 862/1414 cut-off events. [2024-06-27 21:51:41,738 INFO L125 PetriNetUnfolderBase]: For 759/819 co-relation queries the response was YES. [2024-06-27 21:51:41,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3573 conditions, 1414 events. 862/1414 cut-off events. For 759/819 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7879 event pairs, 292 based on Foata normal form. 9/1414 useless extension candidates. Maximal degree in co-relation 3559. Up to 1261 conditions per place. [2024-06-27 21:51:41,747 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 50 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-27 21:51:41,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 352 flow [2024-06-27 21:51:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 21:51:41,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7086956521739131 [2024-06-27 21:51:41,749 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 152 flow. Second operand 5 states and 163 transitions. [2024-06-27 21:51:41,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 352 flow [2024-06-27 21:51:41,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 338 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:41,752 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 188 flow [2024-06-27 21:51:41,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 21:51:41,753 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-06-27 21:51:41,754 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 188 flow [2024-06-27 21:51:41,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:41,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:41,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:41,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:51:41,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:41,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 544407007, now seen corresponding path program 1 times [2024-06-27 21:51:41,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:41,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081594406] [2024-06-27 21:51:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:41,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:41,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081594406] [2024-06-27 21:51:41,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081594406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:41,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:41,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:41,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999863115] [2024-06-27 21:51:41,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:41,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:41,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 188 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) [2024-06-27 21:51:41,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:41,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:41,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:42,179 INFO L124 PetriNetUnfolderBase]: 920/1502 cut-off events. [2024-06-27 21:51:42,180 INFO L125 PetriNetUnfolderBase]: For 1563/1645 co-relation queries the response was YES. [2024-06-27 21:51:42,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4201 conditions, 1502 events. 920/1502 cut-off events. For 1563/1645 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8333 event pairs, 227 based on Foata normal form. 27/1516 useless extension candidates. Maximal degree in co-relation 4186. Up to 1211 conditions per place. [2024-06-27 21:51:42,191 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 59 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-27 21:51:42,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 424 flow [2024-06-27 21:51:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-27 21:51:42,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6992753623188406 [2024-06-27 21:51:42,193 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 188 flow. Second operand 6 states and 193 transitions. [2024-06-27 21:51:42,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 424 flow [2024-06-27 21:51:42,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 400 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:42,219 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 195 flow [2024-06-27 21:51:42,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-27 21:51:42,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-06-27 21:51:42,221 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 195 flow [2024-06-27 21:51:42,221 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) [2024-06-27 21:51:42,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:42,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:42,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:51:42,222 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:42,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1392580758, now seen corresponding path program 1 times [2024-06-27 21:51:42,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:42,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53328557] [2024-06-27 21:51:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:42,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:42,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53328557] [2024-06-27 21:51:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53328557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:42,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:51:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336471256] [2024-06-27 21:51:42,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:42,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:51:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:51:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:51:42,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-27 21:51:42,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:42,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:42,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-27 21:51:42,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:42,729 INFO L124 PetriNetUnfolderBase]: 1238/2194 cut-off events. [2024-06-27 21:51:42,730 INFO L125 PetriNetUnfolderBase]: For 2655/2655 co-relation queries the response was YES. [2024-06-27 21:51:42,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5797 conditions, 2194 events. 1238/2194 cut-off events. For 2655/2655 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13284 event pairs, 559 based on Foata normal form. 4/2143 useless extension candidates. Maximal degree in co-relation 5781. Up to 1800 conditions per place. [2024-06-27 21:51:42,744 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 53 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-27 21:51:42,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 403 flow [2024-06-27 21:51:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-27 21:51:42,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-06-27 21:51:42,748 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 195 flow. Second operand 5 states and 152 transitions. [2024-06-27 21:51:42,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 403 flow [2024-06-27 21:51:42,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 380 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:42,759 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 237 flow [2024-06-27 21:51:42,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-27 21:51:42,763 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-06-27 21:51:42,763 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 237 flow [2024-06-27 21:51:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:42,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:42,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:42,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:51:42,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1808668691, now seen corresponding path program 1 times [2024-06-27 21:51:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284080278] [2024-06-27 21:51:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:42,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284080278] [2024-06-27 21:51:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284080278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:42,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:42,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:51:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019376818] [2024-06-27 21:51:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:51:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:51:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:51:43,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-06-27 21:51:43,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:43,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:43,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-06-27 21:51:43,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:43,146 INFO L124 PetriNetUnfolderBase]: 880/1489 cut-off events. [2024-06-27 21:51:43,146 INFO L125 PetriNetUnfolderBase]: For 2812/2963 co-relation queries the response was YES. [2024-06-27 21:51:43,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 1489 events. 880/1489 cut-off events. For 2812/2963 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8341 event pairs, 285 based on Foata normal form. 2/1465 useless extension candidates. Maximal degree in co-relation 4555. Up to 1319 conditions per place. [2024-06-27 21:51:43,159 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 41 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-27 21:51:43,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 371 flow [2024-06-27 21:51:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:51:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:51:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-27 21:51:43,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2024-06-27 21:51:43,160 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 237 flow. Second operand 3 states and 99 transitions. [2024-06-27 21:51:43,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 371 flow [2024-06-27 21:51:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 348 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:43,168 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 259 flow [2024-06-27 21:51:43,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-27 21:51:43,171 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-06-27 21:51:43,171 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 259 flow [2024-06-27 21:51:43,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:43,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:43,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:43,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:51:43,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:43,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:43,173 INFO L85 PathProgramCache]: Analyzing trace with hash 810424327, now seen corresponding path program 1 times [2024-06-27 21:51:43,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849386271] [2024-06-27 21:51:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:43,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:43,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:43,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849386271] [2024-06-27 21:51:43,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849386271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:43,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:43,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:43,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954812981] [2024-06-27 21:51:43,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:43,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:43,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:43,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:51:43,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:43,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:43,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:51:43,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:43,679 INFO L124 PetriNetUnfolderBase]: 1564/2545 cut-off events. [2024-06-27 21:51:43,679 INFO L125 PetriNetUnfolderBase]: For 4680/4680 co-relation queries the response was YES. [2024-06-27 21:51:43,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7698 conditions, 2545 events. 1564/2545 cut-off events. For 4680/4680 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14673 event pairs, 483 based on Foata normal form. 4/2537 useless extension candidates. Maximal degree in co-relation 7679. Up to 2201 conditions per place. [2024-06-27 21:51:43,700 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 67 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-27 21:51:43,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 96 transitions, 535 flow [2024-06-27 21:51:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 21:51:43,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 21:51:43,703 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 259 flow. Second operand 6 states and 181 transitions. [2024-06-27 21:51:43,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 96 transitions, 535 flow [2024-06-27 21:51:43,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 522 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 21:51:43,713 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 329 flow [2024-06-27 21:51:43,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-27 21:51:43,714 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2024-06-27 21:51:43,714 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 329 flow [2024-06-27 21:51:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:43,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:43,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:51:43,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:43,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1855880506, now seen corresponding path program 1 times [2024-06-27 21:51:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199083262] [2024-06-27 21:51:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:43,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:43,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199083262] [2024-06-27 21:51:43,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199083262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:43,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:43,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:51:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033060362] [2024-06-27 21:51:43,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:51:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:51:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:51:43,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:43,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:43,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:43,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:43,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:44,102 INFO L124 PetriNetUnfolderBase]: 1186/1972 cut-off events. [2024-06-27 21:51:44,103 INFO L125 PetriNetUnfolderBase]: For 5283/5364 co-relation queries the response was YES. [2024-06-27 21:51:44,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6645 conditions, 1972 events. 1186/1972 cut-off events. For 5283/5364 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11318 event pairs, 355 based on Foata normal form. 3/1952 useless extension candidates. Maximal degree in co-relation 6623. Up to 1695 conditions per place. [2024-06-27 21:51:44,117 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 57 selfloop transitions, 19 changer transitions 0/94 dead transitions. [2024-06-27 21:51:44,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 597 flow [2024-06-27 21:51:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 21:51:44,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826086956521739 [2024-06-27 21:51:44,119 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 329 flow. Second operand 5 states and 157 transitions. [2024-06-27 21:51:44,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 597 flow [2024-06-27 21:51:44,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 558 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:44,128 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 402 flow [2024-06-27 21:51:44,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-27 21:51:44,129 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-06-27 21:51:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 402 flow [2024-06-27 21:51:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:44,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:44,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:51:44,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:44,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1759376427, now seen corresponding path program 2 times [2024-06-27 21:51:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:44,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975430412] [2024-06-27 21:51:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:44,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:44,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975430412] [2024-06-27 21:51:44,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975430412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:44,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:44,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:44,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473472591] [2024-06-27 21:51:44,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:44,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:44,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:44,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:51:44,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:44,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:44,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:51:44,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:44,619 INFO L124 PetriNetUnfolderBase]: 1624/2747 cut-off events. [2024-06-27 21:51:44,619 INFO L125 PetriNetUnfolderBase]: For 7911/7914 co-relation queries the response was YES. [2024-06-27 21:51:44,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9115 conditions, 2747 events. 1624/2747 cut-off events. For 7911/7914 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16574 event pairs, 718 based on Foata normal form. 6/2719 useless extension candidates. Maximal degree in co-relation 9091. Up to 2287 conditions per place. [2024-06-27 21:51:44,638 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 74 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-06-27 21:51:44,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 691 flow [2024-06-27 21:51:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 21:51:44,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 21:51:44,640 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 402 flow. Second operand 6 states and 177 transitions. [2024-06-27 21:51:44,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 691 flow [2024-06-27 21:51:44,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 679 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 21:51:44,654 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 474 flow [2024-06-27 21:51:44,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-27 21:51:44,655 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-06-27 21:51:44,655 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 474 flow [2024-06-27 21:51:44,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:44,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:44,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:44,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:51:44,656 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:44,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 53007289, now seen corresponding path program 3 times [2024-06-27 21:51:44,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:44,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307309396] [2024-06-27 21:51:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:44,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:44,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307309396] [2024-06-27 21:51:44,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307309396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:44,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:44,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605310605] [2024-06-27 21:51:44,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:44,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:44,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:51:44,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 474 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:44,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:44,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:51:44,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:45,130 INFO L124 PetriNetUnfolderBase]: 1616/2643 cut-off events. [2024-06-27 21:51:45,130 INFO L125 PetriNetUnfolderBase]: For 9220/9223 co-relation queries the response was YES. [2024-06-27 21:51:45,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 2643 events. 1616/2643 cut-off events. For 9220/9223 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15472 event pairs, 402 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 9271. Up to 2190 conditions per place. [2024-06-27 21:51:45,155 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 72 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-06-27 21:51:45,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 758 flow [2024-06-27 21:51:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 21:51:45,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 21:51:45,158 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 474 flow. Second operand 6 states and 178 transitions. [2024-06-27 21:51:45,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 758 flow [2024-06-27 21:51:45,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 719 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:45,173 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 516 flow [2024-06-27 21:51:45,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2024-06-27 21:51:45,175 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-06-27 21:51:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 516 flow [2024-06-27 21:51:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:45,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:45,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:51:45,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:45,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1331169292, now seen corresponding path program 2 times [2024-06-27 21:51:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003678424] [2024-06-27 21:51:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:45,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:45,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003678424] [2024-06-27 21:51:45,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003678424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:45,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:45,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:51:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254232450] [2024-06-27 21:51:45,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:51:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:51:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:51:45,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:45,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:45,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:45,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:45,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:45,564 INFO L124 PetriNetUnfolderBase]: 1200/2008 cut-off events. [2024-06-27 21:51:45,564 INFO L125 PetriNetUnfolderBase]: For 9330/9432 co-relation queries the response was YES. [2024-06-27 21:51:45,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7682 conditions, 2008 events. 1200/2008 cut-off events. For 9330/9432 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11728 event pairs, 360 based on Foata normal form. 3/1988 useless extension candidates. Maximal degree in co-relation 7653. Up to 1719 conditions per place. [2024-06-27 21:51:45,579 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 60 selfloop transitions, 18 changer transitions 0/96 dead transitions. [2024-06-27 21:51:45,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 96 transitions, 716 flow [2024-06-27 21:51:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:51:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:51:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-27 21:51:45,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-27 21:51:45,581 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 516 flow. Second operand 4 states and 130 transitions. [2024-06-27 21:51:45,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 96 transitions, 716 flow [2024-06-27 21:51:45,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 96 transitions, 645 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:45,599 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 497 flow [2024-06-27 21:51:45,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=497, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2024-06-27 21:51:45,600 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-06-27 21:51:45,600 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 497 flow [2024-06-27 21:51:45,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:45,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:45,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:51:45,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:45,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2067208577, now seen corresponding path program 1 times [2024-06-27 21:51:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:45,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937508642] [2024-06-27 21:51:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937508642] [2024-06-27 21:51:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937508642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:45,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:45,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538085108] [2024-06-27 21:51:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:45,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:45,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 497 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:45,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:45,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:45,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:46,027 INFO L124 PetriNetUnfolderBase]: 1218/2046 cut-off events. [2024-06-27 21:51:46,028 INFO L125 PetriNetUnfolderBase]: For 10302/10404 co-relation queries the response was YES. [2024-06-27 21:51:46,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 2046 events. 1218/2046 cut-off events. For 10302/10404 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11925 event pairs, 353 based on Foata normal form. 3/2021 useless extension candidates. Maximal degree in co-relation 7782. Up to 1693 conditions per place. [2024-06-27 21:51:46,043 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 63 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-27 21:51:46,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 815 flow [2024-06-27 21:51:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:51:46,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 21:51:46,045 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 497 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:51:46,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 815 flow [2024-06-27 21:51:46,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 109 transitions, 769 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:46,060 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 577 flow [2024-06-27 21:51:46,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-27 21:51:46,061 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2024-06-27 21:51:46,061 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 577 flow [2024-06-27 21:51:46,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:46,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:46,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:46,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:51:46,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:46,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1497222843, now seen corresponding path program 2 times [2024-06-27 21:51:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:46,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818796484] [2024-06-27 21:51:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:46,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818796484] [2024-06-27 21:51:46,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818796484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:46,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:46,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484752685] [2024-06-27 21:51:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:46,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:46,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:46,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:46,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 577 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:46,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:46,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:46,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:46,509 INFO L124 PetriNetUnfolderBase]: 1236/2088 cut-off events. [2024-06-27 21:51:46,509 INFO L125 PetriNetUnfolderBase]: For 11518/11620 co-relation queries the response was YES. [2024-06-27 21:51:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8323 conditions, 2088 events. 1236/2088 cut-off events. For 11518/11620 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12317 event pairs, 368 based on Foata normal form. 3/2062 useless extension candidates. Maximal degree in co-relation 8293. Up to 1743 conditions per place. [2024-06-27 21:51:46,524 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 64 selfloop transitions, 23 changer transitions 0/105 dead transitions. [2024-06-27 21:51:46,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 829 flow [2024-06-27 21:51:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:51:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:51:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-27 21:51:46,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2024-06-27 21:51:46,526 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 577 flow. Second operand 4 states and 132 transitions. [2024-06-27 21:51:46,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 829 flow [2024-06-27 21:51:46,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 105 transitions, 792 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:46,545 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 646 flow [2024-06-27 21:51:46,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=646, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-27 21:51:46,545 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-06-27 21:51:46,546 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 646 flow [2024-06-27 21:51:46,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:46,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:46,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:51:46,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:46,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1496777373, now seen corresponding path program 3 times [2024-06-27 21:51:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:46,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868317737] [2024-06-27 21:51:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:46,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868317737] [2024-06-27 21:51:46,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868317737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:46,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:46,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:46,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959346904] [2024-06-27 21:51:46,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:46,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:46,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:46,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:46,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 646 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:46,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:46,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:46,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:46,975 INFO L124 PetriNetUnfolderBase]: 1231/2073 cut-off events. [2024-06-27 21:51:46,975 INFO L125 PetriNetUnfolderBase]: For 12585/12687 co-relation queries the response was YES. [2024-06-27 21:51:46,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 2073 events. 1231/2073 cut-off events. For 12585/12687 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12202 event pairs, 364 based on Foata normal form. 3/2049 useless extension candidates. Maximal degree in co-relation 8501. Up to 1708 conditions per place. [2024-06-27 21:51:46,992 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 61 selfloop transitions, 29 changer transitions 0/108 dead transitions. [2024-06-27 21:51:46,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 108 transitions, 876 flow [2024-06-27 21:51:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 21:51:46,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2024-06-27 21:51:46,994 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 646 flow. Second operand 5 states and 158 transitions. [2024-06-27 21:51:46,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 108 transitions, 876 flow [2024-06-27 21:51:47,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 108 transitions, 804 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:47,018 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 642 flow [2024-06-27 21:51:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=642, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 21:51:47,019 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2024-06-27 21:51:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 642 flow [2024-06-27 21:51:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:47,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:51:47,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:47,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1497238715, now seen corresponding path program 1 times [2024-06-27 21:51:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:47,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882023403] [2024-06-27 21:51:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:47,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:47,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882023403] [2024-06-27 21:51:47,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882023403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:47,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:47,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796202387] [2024-06-27 21:51:47,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:47,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:47,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:47,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 642 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:47,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:47,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:47,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:47,456 INFO L124 PetriNetUnfolderBase]: 1205/2035 cut-off events. [2024-06-27 21:51:47,457 INFO L125 PetriNetUnfolderBase]: For 12545/12647 co-relation queries the response was YES. [2024-06-27 21:51:47,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8206 conditions, 2035 events. 1205/2035 cut-off events. For 12545/12647 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11951 event pairs, 345 based on Foata normal form. 13/2021 useless extension candidates. Maximal degree in co-relation 8174. Up to 1634 conditions per place. [2024-06-27 21:51:47,470 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 78 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-06-27 21:51:47,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 884 flow [2024-06-27 21:51:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:51:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:51:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-27 21:51:47,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-06-27 21:51:47,472 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 642 flow. Second operand 4 states and 130 transitions. [2024-06-27 21:51:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 884 flow [2024-06-27 21:51:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 814 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:47,487 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 602 flow [2024-06-27 21:51:47,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=602, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 21:51:47,488 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2024-06-27 21:51:47,488 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 602 flow [2024-06-27 21:51:47,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:47,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:47,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:47,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:51:47,489 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:47,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1079291353, now seen corresponding path program 1 times [2024-06-27 21:51:47,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:47,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314992259] [2024-06-27 21:51:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:47,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:47,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:47,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314992259] [2024-06-27 21:51:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314992259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:47,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:47,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:47,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304347425] [2024-06-27 21:51:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:47,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:47,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:47,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:47,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 602 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:47,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:47,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:47,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:47,929 INFO L124 PetriNetUnfolderBase]: 1218/2052 cut-off events. [2024-06-27 21:51:47,929 INFO L125 PetriNetUnfolderBase]: For 11584/11642 co-relation queries the response was YES. [2024-06-27 21:51:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8211 conditions, 2052 events. 1218/2052 cut-off events. For 11584/11642 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11971 event pairs, 325 based on Foata normal form. 17/2050 useless extension candidates. Maximal degree in co-relation 8179. Up to 1682 conditions per place. [2024-06-27 21:51:47,945 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 79 selfloop transitions, 27 changer transitions 0/124 dead transitions. [2024-06-27 21:51:47,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 956 flow [2024-06-27 21:51:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 21:51:47,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-06-27 21:51:47,947 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 602 flow. Second operand 6 states and 190 transitions. [2024-06-27 21:51:47,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 956 flow [2024-06-27 21:51:47,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 940 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:47,987 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 696 flow [2024-06-27 21:51:47,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-27 21:51:47,987 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2024-06-27 21:51:47,988 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 696 flow [2024-06-27 21:51:47,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:47,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:47,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:51:47,988 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:47,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1428714598, now seen corresponding path program 1 times [2024-06-27 21:51:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185708313] [2024-06-27 21:51:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:48,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185708313] [2024-06-27 21:51:48,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185708313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:48,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:48,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:48,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384750282] [2024-06-27 21:51:48,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:48,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:48,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:48,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:51:48,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 696 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:48,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:48,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:51:48,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:48,632 INFO L124 PetriNetUnfolderBase]: 1842/3144 cut-off events. [2024-06-27 21:51:48,632 INFO L125 PetriNetUnfolderBase]: For 17204/17204 co-relation queries the response was YES. [2024-06-27 21:51:48,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11981 conditions, 3144 events. 1842/3144 cut-off events. For 17204/17204 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19780 event pairs, 648 based on Foata normal form. 12/3121 useless extension candidates. Maximal degree in co-relation 11948. Up to 2319 conditions per place. [2024-06-27 21:51:48,654 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 107 selfloop transitions, 23 changer transitions 0/144 dead transitions. [2024-06-27 21:51:48,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 144 transitions, 1139 flow [2024-06-27 21:51:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 21:51:48,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 21:51:48,656 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 696 flow. Second operand 7 states and 214 transitions. [2024-06-27 21:51:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 144 transitions, 1139 flow [2024-06-27 21:51:48,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1096 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:48,698 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 784 flow [2024-06-27 21:51:48,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=784, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-27 21:51:48,698 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-27 21:51:48,699 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 784 flow [2024-06-27 21:51:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:48,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:48,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:48,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:51:48,700 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:48,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1089766873, now seen corresponding path program 2 times [2024-06-27 21:51:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:48,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243400435] [2024-06-27 21:51:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243400435] [2024-06-27 21:51:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243400435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:48,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:48,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714569078] [2024-06-27 21:51:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:48,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:48,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 784 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:48,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:48,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:49,182 INFO L124 PetriNetUnfolderBase]: 1419/2425 cut-off events. [2024-06-27 21:51:49,182 INFO L125 PetriNetUnfolderBase]: For 16437/16632 co-relation queries the response was YES. [2024-06-27 21:51:49,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10327 conditions, 2425 events. 1419/2425 cut-off events. For 16437/16632 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14850 event pairs, 364 based on Foata normal form. 5/2399 useless extension candidates. Maximal degree in co-relation 10290. Up to 1969 conditions per place. [2024-06-27 21:51:49,204 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 76 selfloop transitions, 32 changer transitions 0/127 dead transitions. [2024-06-27 21:51:49,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 127 transitions, 1108 flow [2024-06-27 21:51:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:51:49,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 21:51:49,206 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 784 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:51:49,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 127 transitions, 1108 flow [2024-06-27 21:51:49,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 1069 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:49,241 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 837 flow [2024-06-27 21:51:49,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=837, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-06-27 21:51:49,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2024-06-27 21:51:49,242 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 837 flow [2024-06-27 21:51:49,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:49,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:49,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:49,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:51:49,243 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:49,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1615875966, now seen corresponding path program 2 times [2024-06-27 21:51:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:49,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424334581] [2024-06-27 21:51:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:49,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:49,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424334581] [2024-06-27 21:51:49,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424334581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:49,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:49,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805654166] [2024-06-27 21:51:49,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:49,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:49,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:49,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:49,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:51:49,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 837 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:49,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:49,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:51:49,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:49,877 INFO L124 PetriNetUnfolderBase]: 2009/3340 cut-off events. [2024-06-27 21:51:49,877 INFO L125 PetriNetUnfolderBase]: For 21474/21477 co-relation queries the response was YES. [2024-06-27 21:51:49,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 3340 events. 2009/3340 cut-off events. For 21474/21477 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20918 event pairs, 489 based on Foata normal form. 14/3342 useless extension candidates. Maximal degree in co-relation 13457. Up to 2582 conditions per place. [2024-06-27 21:51:49,905 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 108 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-27 21:51:49,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 147 transitions, 1274 flow [2024-06-27 21:51:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:51:49,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 21:51:49,907 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 837 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:51:49,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 147 transitions, 1274 flow [2024-06-27 21:51:49,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 1221 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:49,948 INFO L231 Difference]: Finished difference. Result has 106 places, 106 transitions, 905 flow [2024-06-27 21:51:49,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=905, PETRI_PLACES=106, PETRI_TRANSITIONS=106} [2024-06-27 21:51:49,949 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-06-27 21:51:49,949 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 106 transitions, 905 flow [2024-06-27 21:51:49,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:49,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:49,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:49,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:51:49,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:49,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash 741369542, now seen corresponding path program 3 times [2024-06-27 21:51:49,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:49,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171563953] [2024-06-27 21:51:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:49,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:50,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171563953] [2024-06-27 21:51:50,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171563953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:50,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:50,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901130468] [2024-06-27 21:51:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:50,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:50,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:51:50,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 905 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:50,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:50,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:51:50,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:50,535 INFO L124 PetriNetUnfolderBase]: 1989/3386 cut-off events. [2024-06-27 21:51:50,535 INFO L125 PetriNetUnfolderBase]: For 23345/23348 co-relation queries the response was YES. [2024-06-27 21:51:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13472 conditions, 3386 events. 1989/3386 cut-off events. For 23345/23348 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21657 event pairs, 628 based on Foata normal form. 14/3362 useless extension candidates. Maximal degree in co-relation 13432. Up to 2135 conditions per place. [2024-06-27 21:51:50,562 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 102 selfloop transitions, 31 changer transitions 0/147 dead transitions. [2024-06-27 21:51:50,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1267 flow [2024-06-27 21:51:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 21:51:50,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 21:51:50,564 INFO L175 Difference]: Start difference. First operand has 106 places, 106 transitions, 905 flow. Second operand 7 states and 210 transitions. [2024-06-27 21:51:50,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1267 flow [2024-06-27 21:51:50,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1221 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:50,602 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 903 flow [2024-06-27 21:51:50,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=903, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2024-06-27 21:51:50,602 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-06-27 21:51:50,602 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 903 flow [2024-06-27 21:51:50,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:50,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:50,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:50,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:51:50,603 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:50,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash -646536149, now seen corresponding path program 3 times [2024-06-27 21:51:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912937248] [2024-06-27 21:51:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:50,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:50,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:50,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912937248] [2024-06-27 21:51:50,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912937248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:50,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:50,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:51:50,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245438707] [2024-06-27 21:51:50,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:50,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:51:50,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:50,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:51:50,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:51:50,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:50,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 903 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:50,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:50,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:50,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:51,086 INFO L124 PetriNetUnfolderBase]: 1523/2605 cut-off events. [2024-06-27 21:51:51,087 INFO L125 PetriNetUnfolderBase]: For 19628/19822 co-relation queries the response was YES. [2024-06-27 21:51:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11073 conditions, 2605 events. 1523/2605 cut-off events. For 19628/19822 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16209 event pairs, 376 based on Foata normal form. 4/2582 useless extension candidates. Maximal degree in co-relation 11031. Up to 2146 conditions per place. [2024-06-27 21:51:51,108 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 81 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-27 21:51:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 132 transitions, 1195 flow [2024-06-27 21:51:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-27 21:51:51,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7043478260869566 [2024-06-27 21:51:51,110 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 903 flow. Second operand 5 states and 162 transitions. [2024-06-27 21:51:51,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 132 transitions, 1195 flow [2024-06-27 21:51:51,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 132 transitions, 1111 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:51,145 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 904 flow [2024-06-27 21:51:51,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2024-06-27 21:51:51,145 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-06-27 21:51:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 904 flow [2024-06-27 21:51:51,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:51,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:51,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:51,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:51:51,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1657316928, now seen corresponding path program 1 times [2024-06-27 21:51:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273490133] [2024-06-27 21:51:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:51,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273490133] [2024-06-27 21:51:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273490133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:51,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:51,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:51,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511729733] [2024-06-27 21:51:51,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:51,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:51,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:51,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:51,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:51,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:51,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 904 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:51,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:51,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:51,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:51,638 INFO L124 PetriNetUnfolderBase]: 1541/2647 cut-off events. [2024-06-27 21:51:51,638 INFO L125 PetriNetUnfolderBase]: For 19981/20175 co-relation queries the response was YES. [2024-06-27 21:51:51,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11054 conditions, 2647 events. 1541/2647 cut-off events. For 19981/20175 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16688 event pairs, 392 based on Foata normal form. 4/2616 useless extension candidates. Maximal degree in co-relation 11011. Up to 2054 conditions per place. [2024-06-27 21:51:51,660 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 78 selfloop transitions, 48 changer transitions 0/145 dead transitions. [2024-06-27 21:51:51,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 145 transitions, 1328 flow [2024-06-27 21:51:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 21:51:51,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6770186335403726 [2024-06-27 21:51:51,663 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 904 flow. Second operand 7 states and 218 transitions. [2024-06-27 21:51:51,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 145 transitions, 1328 flow [2024-06-27 21:51:51,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 145 transitions, 1242 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:51:51,694 INFO L231 Difference]: Finished difference. Result has 111 places, 111 transitions, 988 flow [2024-06-27 21:51:51,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=988, PETRI_PLACES=111, PETRI_TRANSITIONS=111} [2024-06-27 21:51:51,694 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 61 predicate places. [2024-06-27 21:51:51,694 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 111 transitions, 988 flow [2024-06-27 21:51:51,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:51,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:51,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:51:51,695 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:51,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -576578064, now seen corresponding path program 2 times [2024-06-27 21:51:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:51,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352380770] [2024-06-27 21:51:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:51,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:51,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352380770] [2024-06-27 21:51:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352380770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:51,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:51,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:51,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030171026] [2024-06-27 21:51:51,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:51,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:51,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:51,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 111 transitions, 988 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:51,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:51,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:51,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:52,196 INFO L124 PetriNetUnfolderBase]: 1582/2714 cut-off events. [2024-06-27 21:51:52,196 INFO L125 PetriNetUnfolderBase]: For 19591/19785 co-relation queries the response was YES. [2024-06-27 21:51:52,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11708 conditions, 2714 events. 1582/2714 cut-off events. For 19591/19785 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17182 event pairs, 380 based on Foata normal form. 4/2687 useless extension candidates. Maximal degree in co-relation 11666. Up to 2099 conditions per place. [2024-06-27 21:51:52,217 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 75 selfloop transitions, 52 changer transitions 0/146 dead transitions. [2024-06-27 21:51:52,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 146 transitions, 1440 flow [2024-06-27 21:51:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 21:51:52,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 21:51:52,219 INFO L175 Difference]: Start difference. First operand has 111 places, 111 transitions, 988 flow. Second operand 7 states and 214 transitions. [2024-06-27 21:51:52,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 146 transitions, 1440 flow [2024-06-27 21:51:52,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 146 transitions, 1363 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:52,249 INFO L231 Difference]: Finished difference. Result has 115 places, 117 transitions, 1089 flow [2024-06-27 21:51:52,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1089, PETRI_PLACES=115, PETRI_TRANSITIONS=117} [2024-06-27 21:51:52,250 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-06-27 21:51:52,250 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 117 transitions, 1089 flow [2024-06-27 21:51:52,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:52,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:52,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:52,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:51:52,251 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:52,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -576964014, now seen corresponding path program 3 times [2024-06-27 21:51:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:52,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481214245] [2024-06-27 21:51:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:52,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:52,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481214245] [2024-06-27 21:51:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481214245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:52,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090941845] [2024-06-27 21:51:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:52,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:52,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:52,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 117 transitions, 1089 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:52,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:52,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:52,757 INFO L124 PetriNetUnfolderBase]: 1580/2730 cut-off events. [2024-06-27 21:51:52,758 INFO L125 PetriNetUnfolderBase]: For 21073/21267 co-relation queries the response was YES. [2024-06-27 21:51:52,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11940 conditions, 2730 events. 1580/2730 cut-off events. For 21073/21267 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17325 event pairs, 401 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 11896. Up to 2098 conditions per place. [2024-06-27 21:51:52,782 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 75 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-06-27 21:51:52,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 1439 flow [2024-06-27 21:51:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 21:51:52,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-27 21:51:52,786 INFO L175 Difference]: Start difference. First operand has 115 places, 117 transitions, 1089 flow. Second operand 7 states and 214 transitions. [2024-06-27 21:51:52,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 1439 flow [2024-06-27 21:51:52,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 145 transitions, 1346 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:52,826 INFO L231 Difference]: Finished difference. Result has 119 places, 117 transitions, 1104 flow [2024-06-27 21:51:52,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1104, PETRI_PLACES=119, PETRI_TRANSITIONS=117} [2024-06-27 21:51:52,827 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-06-27 21:51:52,827 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 117 transitions, 1104 flow [2024-06-27 21:51:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:52,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:52,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:52,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:51:52,828 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:52,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1982457886, now seen corresponding path program 1 times [2024-06-27 21:51:52,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:52,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750191291] [2024-06-27 21:51:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750191291] [2024-06-27 21:51:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750191291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:52,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:52,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:52,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425144522] [2024-06-27 21:51:52,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:52,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:53,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:53,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 117 transitions, 1104 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:53,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:53,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:53,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:53,315 INFO L124 PetriNetUnfolderBase]: 1651/2821 cut-off events. [2024-06-27 21:51:53,315 INFO L125 PetriNetUnfolderBase]: For 24108/24302 co-relation queries the response was YES. [2024-06-27 21:51:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12498 conditions, 2821 events. 1651/2821 cut-off events. For 24108/24302 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17962 event pairs, 388 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 12453. Up to 2281 conditions per place. [2024-06-27 21:51:53,336 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 98 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-27 21:51:53,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 149 transitions, 1470 flow [2024-06-27 21:51:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 21:51:53,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-27 21:51:53,338 INFO L175 Difference]: Start difference. First operand has 119 places, 117 transitions, 1104 flow. Second operand 7 states and 211 transitions. [2024-06-27 21:51:53,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 149 transitions, 1470 flow [2024-06-27 21:51:53,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 149 transitions, 1360 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:51:53,379 INFO L231 Difference]: Finished difference. Result has 120 places, 118 transitions, 1079 flow [2024-06-27 21:51:53,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=120, PETRI_TRANSITIONS=118} [2024-06-27 21:51:53,380 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-06-27 21:51:53,380 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 118 transitions, 1079 flow [2024-06-27 21:51:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:53,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:53,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:53,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:51:53,380 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:53,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:53,381 INFO L85 PathProgramCache]: Analyzing trace with hash 17136410, now seen corresponding path program 4 times [2024-06-27 21:51:53,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:53,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495190382] [2024-06-27 21:51:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:53,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495190382] [2024-06-27 21:51:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495190382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:53,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:53,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701299130] [2024-06-27 21:51:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:53,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:53,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 118 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:53,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:53,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:53,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:53,884 INFO L124 PetriNetUnfolderBase]: 1671/2875 cut-off events. [2024-06-27 21:51:53,884 INFO L125 PetriNetUnfolderBase]: For 24863/25057 co-relation queries the response was YES. [2024-06-27 21:51:53,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12708 conditions, 2875 events. 1671/2875 cut-off events. For 24863/25057 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18464 event pairs, 394 based on Foata normal form. 4/2845 useless extension candidates. Maximal degree in co-relation 12662. Up to 2324 conditions per place. [2024-06-27 21:51:53,905 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 89 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-27 21:51:53,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 148 transitions, 1434 flow [2024-06-27 21:51:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-27 21:51:53,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2024-06-27 21:51:53,907 INFO L175 Difference]: Start difference. First operand has 120 places, 118 transitions, 1079 flow. Second operand 5 states and 165 transitions. [2024-06-27 21:51:53,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 148 transitions, 1434 flow [2024-06-27 21:51:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 148 transitions, 1367 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:53,963 INFO L231 Difference]: Finished difference. Result has 120 places, 121 transitions, 1154 flow [2024-06-27 21:51:53,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1154, PETRI_PLACES=120, PETRI_TRANSITIONS=121} [2024-06-27 21:51:53,963 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-06-27 21:51:53,964 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 121 transitions, 1154 flow [2024-06-27 21:51:53,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:53,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:53,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:53,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:51:53,964 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:53,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash -411335050, now seen corresponding path program 5 times [2024-06-27 21:51:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:53,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304880548] [2024-06-27 21:51:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:54,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:54,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304880548] [2024-06-27 21:51:54,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304880548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:54,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081235553] [2024-06-27 21:51:54,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:54,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:54,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 1154 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:54,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:54,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:54,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:54,502 INFO L124 PetriNetUnfolderBase]: 1692/2914 cut-off events. [2024-06-27 21:51:54,503 INFO L125 PetriNetUnfolderBase]: For 26599/26793 co-relation queries the response was YES. [2024-06-27 21:51:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13008 conditions, 2914 events. 1692/2914 cut-off events. For 26599/26793 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18797 event pairs, 413 based on Foata normal form. 4/2880 useless extension candidates. Maximal degree in co-relation 12961. Up to 2252 conditions per place. [2024-06-27 21:51:54,527 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 75 selfloop transitions, 55 changer transitions 0/149 dead transitions. [2024-06-27 21:51:54,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 149 transitions, 1549 flow [2024-06-27 21:51:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 21:51:54,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 21:51:54,529 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 1154 flow. Second operand 6 states and 186 transitions. [2024-06-27 21:51:54,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 149 transitions, 1549 flow [2024-06-27 21:51:54,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 149 transitions, 1461 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:54,580 INFO L231 Difference]: Finished difference. Result has 122 places, 124 transitions, 1225 flow [2024-06-27 21:51:54,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1225, PETRI_PLACES=122, PETRI_TRANSITIONS=124} [2024-06-27 21:51:54,580 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 72 predicate places. [2024-06-27 21:51:54,580 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 124 transitions, 1225 flow [2024-06-27 21:51:54,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:54,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:54,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:54,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:51:54,581 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:54,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash -411346210, now seen corresponding path program 6 times [2024-06-27 21:51:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:54,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645843898] [2024-06-27 21:51:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:54,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:54,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645843898] [2024-06-27 21:51:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645843898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:54,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:54,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339842392] [2024-06-27 21:51:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:54,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:54,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:54,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:54,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 124 transitions, 1225 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:54,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:54,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:54,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:55,139 INFO L124 PetriNetUnfolderBase]: 1684/2906 cut-off events. [2024-06-27 21:51:55,139 INFO L125 PetriNetUnfolderBase]: For 26421/26615 co-relation queries the response was YES. [2024-06-27 21:51:55,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12973 conditions, 2906 events. 1684/2906 cut-off events. For 26421/26615 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18690 event pairs, 402 based on Foata normal form. 4/2874 useless extension candidates. Maximal degree in co-relation 12926. Up to 2245 conditions per place. [2024-06-27 21:51:55,156 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 76 selfloop transitions, 59 changer transitions 0/154 dead transitions. [2024-06-27 21:51:55,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 154 transitions, 1567 flow [2024-06-27 21:51:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 21:51:55,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920289855072463 [2024-06-27 21:51:55,158 INFO L175 Difference]: Start difference. First operand has 122 places, 124 transitions, 1225 flow. Second operand 6 states and 191 transitions. [2024-06-27 21:51:55,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 154 transitions, 1567 flow [2024-06-27 21:51:55,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 154 transitions, 1435 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:55,202 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 1225 flow [2024-06-27 21:51:55,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1225, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2024-06-27 21:51:55,203 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 74 predicate places. [2024-06-27 21:51:55,203 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 1225 flow [2024-06-27 21:51:55,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:55,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:55,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:55,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:51:55,204 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:55,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash -410946372, now seen corresponding path program 2 times [2024-06-27 21:51:55,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:55,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102076131] [2024-06-27 21:51:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:55,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:55,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:55,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102076131] [2024-06-27 21:51:55,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102076131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:55,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:55,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548904954] [2024-06-27 21:51:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:55,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:55,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:55,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 1225 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:55,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:55,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:55,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:55,780 INFO L124 PetriNetUnfolderBase]: 1756/2996 cut-off events. [2024-06-27 21:51:55,780 INFO L125 PetriNetUnfolderBase]: For 28301/28495 co-relation queries the response was YES. [2024-06-27 21:51:55,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 2996 events. 1756/2996 cut-off events. For 28301/28495 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19287 event pairs, 396 based on Foata normal form. 12/2977 useless extension candidates. Maximal degree in co-relation 13490. Up to 2354 conditions per place. [2024-06-27 21:51:55,807 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 103 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-27 21:51:55,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1595 flow [2024-06-27 21:51:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 21:51:55,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-27 21:51:55,809 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 1225 flow. Second operand 6 states and 185 transitions. [2024-06-27 21:51:55,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1595 flow [2024-06-27 21:51:55,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1457 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:51:55,864 INFO L231 Difference]: Finished difference. Result has 123 places, 125 transitions, 1175 flow [2024-06-27 21:51:55,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1175, PETRI_PLACES=123, PETRI_TRANSITIONS=125} [2024-06-27 21:51:55,865 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-06-27 21:51:55,865 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 125 transitions, 1175 flow [2024-06-27 21:51:55,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:55,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:55,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:55,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:51:55,868 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:55,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 17150298, now seen corresponding path program 3 times [2024-06-27 21:51:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591701224] [2024-06-27 21:51:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:55,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:56,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591701224] [2024-06-27 21:51:56,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591701224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:56,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:56,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786399749] [2024-06-27 21:51:56,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:56,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:56,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:56,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:56,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 125 transitions, 1175 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:56,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:56,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:56,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:56,424 INFO L124 PetriNetUnfolderBase]: 1850/3300 cut-off events. [2024-06-27 21:51:56,424 INFO L125 PetriNetUnfolderBase]: For 30278/30440 co-relation queries the response was YES. [2024-06-27 21:51:56,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14378 conditions, 3300 events. 1850/3300 cut-off events. For 30278/30440 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21966 event pairs, 513 based on Foata normal form. 14/3277 useless extension candidates. Maximal degree in co-relation 14332. Up to 2525 conditions per place. [2024-06-27 21:51:56,444 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 109 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2024-06-27 21:51:56,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 155 transitions, 1559 flow [2024-06-27 21:51:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:51:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:51:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-27 21:51:56,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130434782608696 [2024-06-27 21:51:56,445 INFO L175 Difference]: Start difference. First operand has 123 places, 125 transitions, 1175 flow. Second operand 5 states and 164 transitions. [2024-06-27 21:51:56,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 155 transitions, 1559 flow [2024-06-27 21:51:56,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1491 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:51:56,475 INFO L231 Difference]: Finished difference. Result has 124 places, 127 transitions, 1201 flow [2024-06-27 21:51:56,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1201, PETRI_PLACES=124, PETRI_TRANSITIONS=127} [2024-06-27 21:51:56,475 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 74 predicate places. [2024-06-27 21:51:56,475 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 127 transitions, 1201 flow [2024-06-27 21:51:56,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:56,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:56,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:56,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:51:56,476 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:56,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 32387418, now seen corresponding path program 4 times [2024-06-27 21:51:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:56,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345296841] [2024-06-27 21:51:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345296841] [2024-06-27 21:51:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345296841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:56,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:56,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730351594] [2024-06-27 21:51:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:56,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:56,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 127 transitions, 1201 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:56,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:56,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:56,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:57,047 INFO L124 PetriNetUnfolderBase]: 1927/3297 cut-off events. [2024-06-27 21:51:57,048 INFO L125 PetriNetUnfolderBase]: For 27888/28082 co-relation queries the response was YES. [2024-06-27 21:51:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14617 conditions, 3297 events. 1927/3297 cut-off events. For 27888/28082 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21726 event pairs, 310 based on Foata normal form. 14/3280 useless extension candidates. Maximal degree in co-relation 14570. Up to 2336 conditions per place. [2024-06-27 21:51:57,068 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 117 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2024-06-27 21:51:57,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 169 transitions, 1677 flow [2024-06-27 21:51:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:51:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:51:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 21:51:57,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2024-06-27 21:51:57,070 INFO L175 Difference]: Start difference. First operand has 124 places, 127 transitions, 1201 flow. Second operand 6 states and 198 transitions. [2024-06-27 21:51:57,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 169 transitions, 1677 flow [2024-06-27 21:51:57,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 1617 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:57,116 INFO L231 Difference]: Finished difference. Result has 128 places, 131 transitions, 1281 flow [2024-06-27 21:51:57,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1281, PETRI_PLACES=128, PETRI_TRANSITIONS=131} [2024-06-27 21:51:57,116 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 78 predicate places. [2024-06-27 21:51:57,116 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 131 transitions, 1281 flow [2024-06-27 21:51:57,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:57,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:57,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:57,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:51:57,117 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:57,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1264352212, now seen corresponding path program 1 times [2024-06-27 21:51:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17783143] [2024-06-27 21:51:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:57,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:57,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17783143] [2024-06-27 21:51:57,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17783143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:57,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:57,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:51:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362137004] [2024-06-27 21:51:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:57,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:51:57,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:57,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:51:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:51:57,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2024-06-27 21:51:57,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 131 transitions, 1281 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2024-06-27 21:51:57,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:57,410 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([207] L748-->L751: Formula: (= v_~__unbuffered_cnt~0_3 (+ v_~__unbuffered_cnt~0_4 1)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_4} OutVars{~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_3} AuxVars[] AssignedVars[~__unbuffered_cnt~0][73], [Black: 65#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 196#(and (= ~__unbuffered_p0_EAX~0 2) (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 261#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 1) (= ~y~0 1)), 157#true, Black: 71#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 139#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), Black: 269#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1)), Black: 78#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p0_EAX~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 15#ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANTtrue, Black: 84#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 148#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 1) (= ~y~0 1)), Black: 82#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 277#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), Black: 90#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EBX~0 0)), Black: 155#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0)), 281#true, Black: 97#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 286#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0)), Black: 95#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 205#true, Black: 287#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), 16#P0EXITtrue, 100#true, Black: 102#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0)), Black: 170#(and (= ~__unbuffered_p0_EAX~0 2) (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 169#(and (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 235#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1)), Black: 167#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 295#(and (<= ~main$tmp_guard0~0 (* (div ~main$tmp_guard0~0 256) 256)) (<= 0 ~main$tmp_guard0~0)), 38#L751true, Black: 112#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), P1Thread1of1ForFork0InUse, Black: 243#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), P0Thread1of1ForFork1InUse, P2Thread1of1ForFork2InUse, Black: 119#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 12#L766true, 127#true, Black: 186#(and (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 60#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 187#(and (= ~__unbuffered_p0_EAX~0 2) (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 253#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 1) (= ~y~0 1))]) [2024-06-27 21:51:57,410 INFO L294 olderBase$Statistics]: this new event has 28 ancestors and is cut-off event [2024-06-27 21:51:57,410 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is cut-off event [2024-06-27 21:51:57,410 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is cut-off event [2024-06-27 21:51:57,410 INFO L297 olderBase$Statistics]: existing Event has 28 ancestors and is cut-off event [2024-06-27 21:51:57,435 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([207] L748-->L751: Formula: (= v_~__unbuffered_cnt~0_3 (+ v_~__unbuffered_cnt~0_4 1)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_4} OutVars{~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_3} AuxVars[] AssignedVars[~__unbuffered_cnt~0][73], [Black: 65#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 196#(and (= ~__unbuffered_p0_EAX~0 2) (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 261#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 1) (= ~y~0 1)), 157#true, Black: 71#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 139#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), Black: 269#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1)), Black: 78#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p0_EAX~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 15#ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANTtrue, Black: 84#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 148#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 1) (= ~y~0 1)), Black: 82#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 277#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), Black: 90#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EBX~0 0)), Black: 155#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0)), 281#true, Black: 97#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 286#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0)), 205#true, Black: 287#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), Black: 95#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 26#P2EXITtrue, 16#P0EXITtrue, 100#true, Black: 102#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 0)), Black: 170#(and (= ~__unbuffered_p0_EAX~0 2) (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 235#(and (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (= ~__unbuffered_p0_EAX~0 0) (= ~__unbuffered_p2_EBX~0 1) (<= 1 ~__unbuffered_cnt~0) (= ~y~0 1)), Black: 169#(and (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 167#(and (= ~__unbuffered_cnt~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 295#(and (<= ~main$tmp_guard0~0 (* (div ~main$tmp_guard0~0 256) 256)) (<= 0 ~main$tmp_guard0~0)), 38#L751true, Black: 112#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), P1Thread1of1ForFork0InUse, P0Thread1of1ForFork1InUse, Black: 243#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1)), P2Thread1of1ForFork2InUse, Black: 119#(and (= 2 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), 127#true, Black: 186#(and (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 60#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (= ~__unbuffered_p0_EAX~0 0) (= ~y~0 0) (= ~__unbuffered_p2_EBX~0 0) (= ~__unbuffered_p2_EAX~0 0)), Black: 187#(and (= ~__unbuffered_p0_EAX~0 2) (= 2 ~x~0) (<= 1 ~__unbuffered_cnt~0) (= ~__unbuffered_p2_EBX~0 0) (= ~y~0 1) (= ~__unbuffered_p2_EAX~0 0)), Black: 253#(and (= ~__unbuffered_cnt~0 0) (<= 0 ~x~0) (<= 0 ~__unbuffered_p2_EAX~0) (<= 0 ~__unbuffered_p0_EAX~0) (= ~__unbuffered_p2_EBX~0 1) (= ~y~0 1))]) [2024-06-27 21:51:57,435 INFO L294 olderBase$Statistics]: this new event has 29 ancestors and is cut-off event [2024-06-27 21:51:57,435 INFO L297 olderBase$Statistics]: existing Event has 29 ancestors and is cut-off event [2024-06-27 21:51:57,435 INFO L297 olderBase$Statistics]: existing Event has 29 ancestors and is cut-off event [2024-06-27 21:51:57,435 INFO L297 olderBase$Statistics]: existing Event has 29 ancestors and is cut-off event [2024-06-27 21:51:57,466 INFO L124 PetriNetUnfolderBase]: 1463/3137 cut-off events. [2024-06-27 21:51:57,467 INFO L125 PetriNetUnfolderBase]: For 18221/18511 co-relation queries the response was YES. [2024-06-27 21:51:57,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11260 conditions, 3137 events. 1463/3137 cut-off events. For 18221/18511 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24578 event pairs, 236 based on Foata normal form. 150/3002 useless extension candidates. Maximal degree in co-relation 11211. Up to 1248 conditions per place. [2024-06-27 21:51:57,485 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 30 selfloop transitions, 45 changer transitions 0/145 dead transitions. [2024-06-27 21:51:57,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 145 transitions, 1491 flow [2024-06-27 21:51:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:51:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:51:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-06-27 21:51:57,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663043478260869 [2024-06-27 21:51:57,487 INFO L175 Difference]: Start difference. First operand has 128 places, 131 transitions, 1281 flow. Second operand 4 states and 141 transitions. [2024-06-27 21:51:57,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 145 transitions, 1491 flow [2024-06-27 21:51:57,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 145 transitions, 1452 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:57,507 INFO L231 Difference]: Finished difference. Result has 131 places, 132 transitions, 1428 flow [2024-06-27 21:51:57,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1428, PETRI_PLACES=131, PETRI_TRANSITIONS=132} [2024-06-27 21:51:57,508 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-06-27 21:51:57,508 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 132 transitions, 1428 flow [2024-06-27 21:51:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:57,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:57,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:51:57,508 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:57,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -558371664, now seen corresponding path program 1 times [2024-06-27 21:51:57,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649603998] [2024-06-27 21:51:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:57,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649603998] [2024-06-27 21:51:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649603998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:57,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:57,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:57,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713822745] [2024-06-27 21:51:57,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:57,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:57,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:57,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:57,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:57,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 132 transitions, 1428 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:57,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:57,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:57,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:58,268 INFO L124 PetriNetUnfolderBase]: 2116/3850 cut-off events. [2024-06-27 21:51:58,268 INFO L125 PetriNetUnfolderBase]: For 31105/31257 co-relation queries the response was YES. [2024-06-27 21:51:58,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17291 conditions, 3850 events. 2116/3850 cut-off events. For 31105/31257 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26452 event pairs, 657 based on Foata normal form. 28/3714 useless extension candidates. Maximal degree in co-relation 17239. Up to 2467 conditions per place. [2024-06-27 21:51:58,298 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 116 selfloop transitions, 37 changer transitions 0/173 dead transitions. [2024-06-27 21:51:58,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 173 transitions, 1932 flow [2024-06-27 21:51:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 21:51:58,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 21:51:58,299 INFO L175 Difference]: Start difference. First operand has 131 places, 132 transitions, 1428 flow. Second operand 7 states and 217 transitions. [2024-06-27 21:51:58,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 173 transitions, 1932 flow [2024-06-27 21:51:58,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 173 transitions, 1886 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:51:58,351 INFO L231 Difference]: Finished difference. Result has 136 places, 134 transitions, 1484 flow [2024-06-27 21:51:58,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1484, PETRI_PLACES=136, PETRI_TRANSITIONS=134} [2024-06-27 21:51:58,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-06-27 21:51:58,352 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 134 transitions, 1484 flow [2024-06-27 21:51:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:58,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:51:58,353 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:58,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash -162792374, now seen corresponding path program 2 times [2024-06-27 21:51:58,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:58,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693014553] [2024-06-27 21:51:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693014553] [2024-06-27 21:51:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693014553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802990004] [2024-06-27 21:51:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:58,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 134 transitions, 1484 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:58,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:58,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:58,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:58,947 INFO L124 PetriNetUnfolderBase]: 2201/3925 cut-off events. [2024-06-27 21:51:58,947 INFO L125 PetriNetUnfolderBase]: For 34143/34295 co-relation queries the response was YES. [2024-06-27 21:51:58,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18376 conditions, 3925 events. 2201/3925 cut-off events. For 34143/34295 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26951 event pairs, 883 based on Foata normal form. 28/3778 useless extension candidates. Maximal degree in co-relation 18323. Up to 3236 conditions per place. [2024-06-27 21:51:58,971 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 108 selfloop transitions, 36 changer transitions 0/164 dead transitions. [2024-06-27 21:51:58,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 164 transitions, 1880 flow [2024-06-27 21:51:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 21:51:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 21:51:58,974 INFO L175 Difference]: Start difference. First operand has 136 places, 134 transitions, 1484 flow. Second operand 7 states and 208 transitions. [2024-06-27 21:51:58,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 164 transitions, 1880 flow [2024-06-27 21:51:59,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 164 transitions, 1832 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:51:59,099 INFO L231 Difference]: Finished difference. Result has 140 places, 135 transitions, 1527 flow [2024-06-27 21:51:59,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1527, PETRI_PLACES=140, PETRI_TRANSITIONS=135} [2024-06-27 21:51:59,101 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 90 predicate places. [2024-06-27 21:51:59,102 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 135 transitions, 1527 flow [2024-06-27 21:51:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:59,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:59,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:59,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:51:59,102 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:59,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1314247754, now seen corresponding path program 3 times [2024-06-27 21:51:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:59,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803586109] [2024-06-27 21:51:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:59,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:59,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803586109] [2024-06-27 21:51:59,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803586109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:51:59,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:51:59,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:51:59,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904514852] [2024-06-27 21:51:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:51:59,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:51:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:51:59,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:51:59,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:51:59,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 135 transitions, 1527 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:59,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:59,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:51:59,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:59,778 INFO L124 PetriNetUnfolderBase]: 2286/4075 cut-off events. [2024-06-27 21:51:59,779 INFO L125 PetriNetUnfolderBase]: For 36043/36195 co-relation queries the response was YES. [2024-06-27 21:51:59,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19169 conditions, 4075 events. 2286/4075 cut-off events. For 36043/36195 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28165 event pairs, 907 based on Foata normal form. 28/3920 useless extension candidates. Maximal degree in co-relation 19114. Up to 3371 conditions per place. [2024-06-27 21:51:59,805 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 104 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-06-27 21:51:59,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 159 transitions, 1897 flow [2024-06-27 21:51:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:51:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:51:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 21:51:59,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 21:51:59,807 INFO L175 Difference]: Start difference. First operand has 140 places, 135 transitions, 1527 flow. Second operand 7 states and 203 transitions. [2024-06-27 21:51:59,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 159 transitions, 1897 flow [2024-06-27 21:51:59,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 159 transitions, 1826 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:51:59,864 INFO L231 Difference]: Finished difference. Result has 142 places, 136 transitions, 1545 flow [2024-06-27 21:51:59,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1545, PETRI_PLACES=142, PETRI_TRANSITIONS=136} [2024-06-27 21:51:59,865 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-06-27 21:51:59,865 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 136 transitions, 1545 flow [2024-06-27 21:51:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:59,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:59,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:59,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:51:59,866 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:51:59,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash 133159788, now seen corresponding path program 4 times [2024-06-27 21:51:59,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:59,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043970797] [2024-06-27 21:51:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:59,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:00,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043970797] [2024-06-27 21:52:00,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043970797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:00,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:00,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:52:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753657759] [2024-06-27 21:52:00,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:00,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:52:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:52:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:52:00,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:00,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 136 transitions, 1545 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:00,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:00,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:00,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:00,576 INFO L124 PetriNetUnfolderBase]: 2265/4095 cut-off events. [2024-06-27 21:52:00,577 INFO L125 PetriNetUnfolderBase]: For 36021/36173 co-relation queries the response was YES. [2024-06-27 21:52:00,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18986 conditions, 4095 events. 2265/4095 cut-off events. For 36021/36173 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28411 event pairs, 761 based on Foata normal form. 28/3934 useless extension candidates. Maximal degree in co-relation 18930. Up to 2557 conditions per place. [2024-06-27 21:52:00,606 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 111 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-27 21:52:00,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 167 transitions, 1941 flow [2024-06-27 21:52:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:52:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:52:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 21:52:00,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-06-27 21:52:00,608 INFO L175 Difference]: Start difference. First operand has 142 places, 136 transitions, 1545 flow. Second operand 6 states and 188 transitions. [2024-06-27 21:52:00,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 167 transitions, 1941 flow [2024-06-27 21:52:00,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 167 transitions, 1868 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:52:00,666 INFO L231 Difference]: Finished difference. Result has 143 places, 136 transitions, 1561 flow [2024-06-27 21:52:00,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1561, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2024-06-27 21:52:00,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 93 predicate places. [2024-06-27 21:52:00,667 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 1561 flow [2024-06-27 21:52:00,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:00,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:00,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:00,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:52:00,668 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:00,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1017292287, now seen corresponding path program 1 times [2024-06-27 21:52:00,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:00,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704651521] [2024-06-27 21:52:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:00,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:00,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704651521] [2024-06-27 21:52:00,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704651521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:00,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:00,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:00,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480403952] [2024-06-27 21:52:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:00,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:00,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:00,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:00,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 1561 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:00,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:00,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:00,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:01,457 INFO L124 PetriNetUnfolderBase]: 2722/4876 cut-off events. [2024-06-27 21:52:01,457 INFO L125 PetriNetUnfolderBase]: For 50475/50627 co-relation queries the response was YES. [2024-06-27 21:52:01,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22579 conditions, 4876 events. 2722/4876 cut-off events. For 50475/50627 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35853 event pairs, 1076 based on Foata normal form. 44/4729 useless extension candidates. Maximal degree in co-relation 22522. Up to 2107 conditions per place. [2024-06-27 21:52:01,482 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 106 selfloop transitions, 60 changer transitions 0/186 dead transitions. [2024-06-27 21:52:01,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 186 transitions, 2139 flow [2024-06-27 21:52:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-27 21:52:01,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6820652173913043 [2024-06-27 21:52:01,483 INFO L175 Difference]: Start difference. First operand has 143 places, 136 transitions, 1561 flow. Second operand 8 states and 251 transitions. [2024-06-27 21:52:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 186 transitions, 2139 flow [2024-06-27 21:52:01,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 2039 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:52:01,559 INFO L231 Difference]: Finished difference. Result has 144 places, 136 transitions, 1592 flow [2024-06-27 21:52:01,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1592, PETRI_PLACES=144, PETRI_TRANSITIONS=136} [2024-06-27 21:52:01,560 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 94 predicate places. [2024-06-27 21:52:01,560 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 1592 flow [2024-06-27 21:52:01,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:01,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:01,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:52:01,560 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:01,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1009882977, now seen corresponding path program 2 times [2024-06-27 21:52:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:01,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674814006] [2024-06-27 21:52:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:01,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:01,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674814006] [2024-06-27 21:52:01,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674814006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:01,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:01,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095002753] [2024-06-27 21:52:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:01,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:01,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 136 transitions, 1592 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:01,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:01,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:01,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:02,376 INFO L124 PetriNetUnfolderBase]: 3225/5834 cut-off events. [2024-06-27 21:52:02,376 INFO L125 PetriNetUnfolderBase]: For 52223/52375 co-relation queries the response was YES. [2024-06-27 21:52:02,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26054 conditions, 5834 events. 3225/5834 cut-off events. For 52223/52375 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44744 event pairs, 1509 based on Foata normal form. 44/5658 useless extension candidates. Maximal degree in co-relation 25998. Up to 4002 conditions per place. [2024-06-27 21:52:02,416 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 97 selfloop transitions, 60 changer transitions 0/177 dead transitions. [2024-06-27 21:52:02,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 177 transitions, 2100 flow [2024-06-27 21:52:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 21:52:02,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-27 21:52:02,418 INFO L175 Difference]: Start difference. First operand has 144 places, 136 transitions, 1592 flow. Second operand 8 states and 244 transitions. [2024-06-27 21:52:02,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 177 transitions, 2100 flow [2024-06-27 21:52:02,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 177 transitions, 1981 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:02,493 INFO L231 Difference]: Finished difference. Result has 146 places, 136 transitions, 1596 flow [2024-06-27 21:52:02,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1596, PETRI_PLACES=146, PETRI_TRANSITIONS=136} [2024-06-27 21:52:02,493 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-06-27 21:52:02,493 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 136 transitions, 1596 flow [2024-06-27 21:52:02,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:02,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:02,493 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] [2024-06-27 21:52:02,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:52:02,494 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:02,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1009873677, now seen corresponding path program 3 times [2024-06-27 21:52:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:02,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52582619] [2024-06-27 21:52:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:02,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52582619] [2024-06-27 21:52:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52582619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:02,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:02,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:02,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971779161] [2024-06-27 21:52:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:02,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:02,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:02,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:02,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:02,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 136 transitions, 1596 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:02,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:02,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:02,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:03,254 INFO L124 PetriNetUnfolderBase]: 2906/5276 cut-off events. [2024-06-27 21:52:03,254 INFO L125 PetriNetUnfolderBase]: For 42863/43015 co-relation queries the response was YES. [2024-06-27 21:52:03,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23043 conditions, 5276 events. 2906/5276 cut-off events. For 42863/43015 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 39705 event pairs, 1440 based on Foata normal form. 48/5106 useless extension candidates. Maximal degree in co-relation 22986. Up to 4063 conditions per place. [2024-06-27 21:52:03,297 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 88 selfloop transitions, 60 changer transitions 0/168 dead transitions. [2024-06-27 21:52:03,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 168 transitions, 2000 flow [2024-06-27 21:52:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 21:52:03,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 21:52:03,298 INFO L175 Difference]: Start difference. First operand has 146 places, 136 transitions, 1596 flow. Second operand 8 states and 236 transitions. [2024-06-27 21:52:03,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 168 transitions, 2000 flow [2024-06-27 21:52:03,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 168 transitions, 1881 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:03,355 INFO L231 Difference]: Finished difference. Result has 148 places, 136 transitions, 1602 flow [2024-06-27 21:52:03,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1602, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2024-06-27 21:52:03,355 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-06-27 21:52:03,355 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 1602 flow [2024-06-27 21:52:03,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:03,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:03,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:03,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:52:03,356 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:03,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1836766915, now seen corresponding path program 4 times [2024-06-27 21:52:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:03,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782056060] [2024-06-27 21:52:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:03,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:03,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782056060] [2024-06-27 21:52:03,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782056060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:03,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:03,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133825161] [2024-06-27 21:52:03,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:03,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:03,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:03,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 1602 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:03,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:03,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:03,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:04,182 INFO L124 PetriNetUnfolderBase]: 3143/5708 cut-off events. [2024-06-27 21:52:04,183 INFO L125 PetriNetUnfolderBase]: For 45700/45852 co-relation queries the response was YES. [2024-06-27 21:52:04,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24626 conditions, 5708 events. 3143/5708 cut-off events. For 45700/45852 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 43880 event pairs, 1598 based on Foata normal form. 48/5518 useless extension candidates. Maximal degree in co-relation 24568. Up to 4470 conditions per place. [2024-06-27 21:52:04,215 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 84 selfloop transitions, 58 changer transitions 0/162 dead transitions. [2024-06-27 21:52:04,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 162 transitions, 1978 flow [2024-06-27 21:52:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 21:52:04,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-27 21:52:04,216 INFO L175 Difference]: Start difference. First operand has 148 places, 136 transitions, 1602 flow. Second operand 8 states and 231 transitions. [2024-06-27 21:52:04,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 162 transitions, 1978 flow [2024-06-27 21:52:04,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 162 transitions, 1861 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:04,281 INFO L231 Difference]: Finished difference. Result has 150 places, 136 transitions, 1606 flow [2024-06-27 21:52:04,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1606, PETRI_PLACES=150, PETRI_TRANSITIONS=136} [2024-06-27 21:52:04,282 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 21:52:04,282 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 136 transitions, 1606 flow [2024-06-27 21:52:04,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:04,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:04,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:04,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:52:04,282 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:04,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2087302431, now seen corresponding path program 5 times [2024-06-27 21:52:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087274984] [2024-06-27 21:52:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:04,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:04,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087274984] [2024-06-27 21:52:04,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087274984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:04,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:04,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:04,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240513569] [2024-06-27 21:52:04,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:04,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:04,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:04,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 136 transitions, 1606 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:04,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:04,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:05,310 INFO L124 PetriNetUnfolderBase]: 3380/6160 cut-off events. [2024-06-27 21:52:05,310 INFO L125 PetriNetUnfolderBase]: For 48656/48808 co-relation queries the response was YES. [2024-06-27 21:52:05,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26216 conditions, 6160 events. 3380/6160 cut-off events. For 48656/48808 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48349 event pairs, 1784 based on Foata normal form. 48/5954 useless extension candidates. Maximal degree in co-relation 26157. Up to 4877 conditions per place. [2024-06-27 21:52:05,341 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 85 selfloop transitions, 57 changer transitions 0/162 dead transitions. [2024-06-27 21:52:05,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 162 transitions, 1982 flow [2024-06-27 21:52:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 21:52:05,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 21:52:05,343 INFO L175 Difference]: Start difference. First operand has 150 places, 136 transitions, 1606 flow. Second operand 8 states and 232 transitions. [2024-06-27 21:52:05,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 162 transitions, 1982 flow [2024-06-27 21:52:05,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 162 transitions, 1869 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:05,407 INFO L231 Difference]: Finished difference. Result has 152 places, 136 transitions, 1612 flow [2024-06-27 21:52:05,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=152, PETRI_TRANSITIONS=136} [2024-06-27 21:52:05,407 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-06-27 21:52:05,407 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 136 transitions, 1612 flow [2024-06-27 21:52:05,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:05,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:05,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:52:05,408 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:05,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -448022369, now seen corresponding path program 6 times [2024-06-27 21:52:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:05,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347809123] [2024-06-27 21:52:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:05,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347809123] [2024-06-27 21:52:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347809123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:05,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:05,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:05,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759398245] [2024-06-27 21:52:05,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:05,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:05,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:05,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 136 transitions, 1612 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:05,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:05,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:05,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:06,268 INFO L124 PetriNetUnfolderBase]: 3585/6615 cut-off events. [2024-06-27 21:52:06,268 INFO L125 PetriNetUnfolderBase]: For 51140/51292 co-relation queries the response was YES. [2024-06-27 21:52:06,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27626 conditions, 6615 events. 3585/6615 cut-off events. For 51140/51292 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 52944 event pairs, 1810 based on Foata normal form. 44/6399 useless extension candidates. Maximal degree in co-relation 27566. Up to 4311 conditions per place. [2024-06-27 21:52:06,315 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 93 selfloop transitions, 57 changer transitions 0/170 dead transitions. [2024-06-27 21:52:06,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 170 transitions, 2052 flow [2024-06-27 21:52:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 21:52:06,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-27 21:52:06,317 INFO L175 Difference]: Start difference. First operand has 152 places, 136 transitions, 1612 flow. Second operand 8 states and 238 transitions. [2024-06-27 21:52:06,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 170 transitions, 2052 flow [2024-06-27 21:52:06,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 170 transitions, 1941 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:06,399 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1618 flow [2024-06-27 21:52:06,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1618, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-27 21:52:06,400 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-06-27 21:52:06,400 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1618 flow [2024-06-27 21:52:06,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:06,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:06,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:06,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:52:06,401 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:06,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1823422531, now seen corresponding path program 1 times [2024-06-27 21:52:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086210182] [2024-06-27 21:52:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:06,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086210182] [2024-06-27 21:52:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086210182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:06,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899543172] [2024-06-27 21:52:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:06,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:06,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1618 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:06,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:06,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:06,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:07,310 INFO L124 PetriNetUnfolderBase]: 3790/6960 cut-off events. [2024-06-27 21:52:07,311 INFO L125 PetriNetUnfolderBase]: For 54269/54421 co-relation queries the response was YES. [2024-06-27 21:52:07,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28974 conditions, 6960 events. 3790/6960 cut-off events. For 54269/54421 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 56385 event pairs, 1965 based on Foata normal form. 44/6745 useless extension candidates. Maximal degree in co-relation 28913. Up to 4244 conditions per place. [2024-06-27 21:52:07,360 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 92 selfloop transitions, 58 changer transitions 0/170 dead transitions. [2024-06-27 21:52:07,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 170 transitions, 2058 flow [2024-06-27 21:52:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 21:52:07,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-27 21:52:07,362 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1618 flow. Second operand 8 states and 237 transitions. [2024-06-27 21:52:07,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 170 transitions, 2058 flow [2024-06-27 21:52:07,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 170 transitions, 1945 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:07,459 INFO L231 Difference]: Finished difference. Result has 156 places, 136 transitions, 1624 flow [2024-06-27 21:52:07,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1624, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2024-06-27 21:52:07,460 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-27 21:52:07,460 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 1624 flow [2024-06-27 21:52:07,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:07,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:07,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:07,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:52:07,461 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:07,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash -711748743, now seen corresponding path program 7 times [2024-06-27 21:52:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:07,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501600197] [2024-06-27 21:52:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:07,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:07,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:07,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501600197] [2024-06-27 21:52:07,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501600197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:07,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:07,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:07,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320361966] [2024-06-27 21:52:07,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:07,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:07,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:07,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:07,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 1624 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:07,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:07,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:07,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:08,420 INFO L124 PetriNetUnfolderBase]: 4027/7635 cut-off events. [2024-06-27 21:52:08,421 INFO L125 PetriNetUnfolderBase]: For 59757/59909 co-relation queries the response was YES. [2024-06-27 21:52:08,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30850 conditions, 7635 events. 4027/7635 cut-off events. For 59757/59909 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 63697 event pairs, 1943 based on Foata normal form. 48/7396 useless extension candidates. Maximal degree in co-relation 30788. Up to 5159 conditions per place. [2024-06-27 21:52:08,471 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 105 selfloop transitions, 44 changer transitions 0/169 dead transitions. [2024-06-27 21:52:08,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 169 transitions, 2034 flow [2024-06-27 21:52:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:52:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:52:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-27 21:52:08,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6992753623188406 [2024-06-27 21:52:08,473 INFO L175 Difference]: Start difference. First operand has 156 places, 136 transitions, 1624 flow. Second operand 6 states and 193 transitions. [2024-06-27 21:52:08,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 169 transitions, 2034 flow [2024-06-27 21:52:08,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 169 transitions, 1919 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:08,559 INFO L231 Difference]: Finished difference. Result has 156 places, 136 transitions, 1617 flow [2024-06-27 21:52:08,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1617, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2024-06-27 21:52:08,559 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-27 21:52:08,559 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 1617 flow [2024-06-27 21:52:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:08,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:08,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:08,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:52:08,560 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:08,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 204211803, now seen corresponding path program 8 times [2024-06-27 21:52:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:08,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745240706] [2024-06-27 21:52:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745240706] [2024-06-27 21:52:08,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745240706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:08,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:08,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:08,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153664400] [2024-06-27 21:52:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:08,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:08,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:08,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:08,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:08,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 1617 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:08,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:08,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:08,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:09,465 INFO L124 PetriNetUnfolderBase]: 4264/7824 cut-off events. [2024-06-27 21:52:09,465 INFO L125 PetriNetUnfolderBase]: For 63275/63427 co-relation queries the response was YES. [2024-06-27 21:52:09,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32519 conditions, 7824 events. 4264/7824 cut-off events. For 63275/63427 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 65361 event pairs, 2476 based on Foata normal form. 48/7567 useless extension candidates. Maximal degree in co-relation 32456. Up to 5979 conditions per place. [2024-06-27 21:52:09,520 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 86 selfloop transitions, 55 changer transitions 0/161 dead transitions. [2024-06-27 21:52:09,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 161 transitions, 1989 flow [2024-06-27 21:52:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 21:52:09,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-06-27 21:52:09,521 INFO L175 Difference]: Start difference. First operand has 156 places, 136 transitions, 1617 flow. Second operand 7 states and 206 transitions. [2024-06-27 21:52:09,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 161 transitions, 1989 flow [2024-06-27 21:52:09,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 161 transitions, 1884 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:09,631 INFO L231 Difference]: Finished difference. Result has 157 places, 136 transitions, 1630 flow [2024-06-27 21:52:09,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1630, PETRI_PLACES=157, PETRI_TRANSITIONS=136} [2024-06-27 21:52:09,631 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 21:52:09,631 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 136 transitions, 1630 flow [2024-06-27 21:52:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:09,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:09,632 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] [2024-06-27 21:52:09,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:52:09,632 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:09,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash -166686147, now seen corresponding path program 9 times [2024-06-27 21:52:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:09,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348257875] [2024-06-27 21:52:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:09,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348257875] [2024-06-27 21:52:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348257875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:09,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:09,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526614505] [2024-06-27 21:52:09,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:09,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:09,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:09,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 136 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:09,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:09,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:09,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:10,690 INFO L124 PetriNetUnfolderBase]: 4501/8266 cut-off events. [2024-06-27 21:52:10,690 INFO L125 PetriNetUnfolderBase]: For 64012/64164 co-relation queries the response was YES. [2024-06-27 21:52:10,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33730 conditions, 8266 events. 4501/8266 cut-off events. For 64012/64164 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 69747 event pairs, 2648 based on Foata normal form. 48/7993 useless extension candidates. Maximal degree in co-relation 33667. Up to 5964 conditions per place. [2024-06-27 21:52:10,753 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 88 selfloop transitions, 59 changer transitions 0/167 dead transitions. [2024-06-27 21:52:10,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 167 transitions, 2030 flow [2024-06-27 21:52:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 21:52:10,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 21:52:10,754 INFO L175 Difference]: Start difference. First operand has 157 places, 136 transitions, 1630 flow. Second operand 7 states and 212 transitions. [2024-06-27 21:52:10,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 167 transitions, 2030 flow [2024-06-27 21:52:10,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 167 transitions, 1921 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:10,855 INFO L231 Difference]: Finished difference. Result has 158 places, 136 transitions, 1650 flow [2024-06-27 21:52:10,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1650, PETRI_PLACES=158, PETRI_TRANSITIONS=136} [2024-06-27 21:52:10,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-06-27 21:52:10,855 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 136 transitions, 1650 flow [2024-06-27 21:52:10,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:10,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:10,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:52:10,856 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:10,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -167012577, now seen corresponding path program 10 times [2024-06-27 21:52:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:10,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629951451] [2024-06-27 21:52:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629951451] [2024-06-27 21:52:11,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629951451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:11,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:11,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:11,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496107846] [2024-06-27 21:52:11,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:11,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:11,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:11,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 136 transitions, 1650 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:11,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:11,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:11,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:12,033 INFO L124 PetriNetUnfolderBase]: 4666/8527 cut-off events. [2024-06-27 21:52:12,033 INFO L125 PetriNetUnfolderBase]: For 63505/63657 co-relation queries the response was YES. [2024-06-27 21:52:12,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34598 conditions, 8527 events. 4666/8527 cut-off events. For 63505/63657 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 72558 event pairs, 2043 based on Foata normal form. 44/8262 useless extension candidates. Maximal degree in co-relation 34535. Up to 3409 conditions per place. [2024-06-27 21:52:12,085 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 98 selfloop transitions, 60 changer transitions 0/178 dead transitions. [2024-06-27 21:52:12,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 178 transitions, 2128 flow [2024-06-27 21:52:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-27 21:52:12,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-06-27 21:52:12,086 INFO L175 Difference]: Start difference. First operand has 158 places, 136 transitions, 1650 flow. Second operand 7 states and 222 transitions. [2024-06-27 21:52:12,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 178 transitions, 2128 flow [2024-06-27 21:52:12,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 178 transitions, 2009 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:52:12,184 INFO L231 Difference]: Finished difference. Result has 158 places, 136 transitions, 1657 flow [2024-06-27 21:52:12,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1657, PETRI_PLACES=158, PETRI_TRANSITIONS=136} [2024-06-27 21:52:12,184 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-06-27 21:52:12,184 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 136 transitions, 1657 flow [2024-06-27 21:52:12,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:12,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:12,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:52:12,185 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:12,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash 217556187, now seen corresponding path program 2 times [2024-06-27 21:52:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:12,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957988311] [2024-06-27 21:52:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:12,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:12,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957988311] [2024-06-27 21:52:12,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957988311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:12,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:12,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:12,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863988213] [2024-06-27 21:52:12,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:12,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:12,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 136 transitions, 1657 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:12,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:12,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:12,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:13,220 INFO L124 PetriNetUnfolderBase]: 4871/9112 cut-off events. [2024-06-27 21:52:13,220 INFO L125 PetriNetUnfolderBase]: For 64507/64659 co-relation queries the response was YES. [2024-06-27 21:52:13,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36268 conditions, 9112 events. 4871/9112 cut-off events. For 64507/64659 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 79077 event pairs, 2708 based on Foata normal form. 44/8818 useless extension candidates. Maximal degree in co-relation 36206. Up to 4768 conditions per place. [2024-06-27 21:52:13,284 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 94 selfloop transitions, 55 changer transitions 0/169 dead transitions. [2024-06-27 21:52:13,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 169 transitions, 2093 flow [2024-06-27 21:52:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 21:52:13,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-27 21:52:13,285 INFO L175 Difference]: Start difference. First operand has 158 places, 136 transitions, 1657 flow. Second operand 7 states and 212 transitions. [2024-06-27 21:52:13,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 169 transitions, 2093 flow [2024-06-27 21:52:13,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 169 transitions, 1968 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:52:13,404 INFO L231 Difference]: Finished difference. Result has 157 places, 136 transitions, 1646 flow [2024-06-27 21:52:13,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1646, PETRI_PLACES=157, PETRI_TRANSITIONS=136} [2024-06-27 21:52:13,405 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 21:52:13,405 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 136 transitions, 1646 flow [2024-06-27 21:52:13,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:13,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:13,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:13,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:52:13,405 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:13,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:13,406 INFO L85 PathProgramCache]: Analyzing trace with hash 574270683, now seen corresponding path program 3 times [2024-06-27 21:52:13,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:13,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806265212] [2024-06-27 21:52:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:13,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:13,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:13,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806265212] [2024-06-27 21:52:13,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806265212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:13,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:13,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339139394] [2024-06-27 21:52:13,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:13,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:13,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:13,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:13,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 136 transitions, 1646 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:13,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:13,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:13,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:14,516 INFO L124 PetriNetUnfolderBase]: 5129/9816 cut-off events. [2024-06-27 21:52:14,517 INFO L125 PetriNetUnfolderBase]: For 64440/64592 co-relation queries the response was YES. [2024-06-27 21:52:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38138 conditions, 9816 events. 5129/9816 cut-off events. For 64440/64592 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 87101 event pairs, 2384 based on Foata normal form. 50/9524 useless extension candidates. Maximal degree in co-relation 38078. Up to 6130 conditions per place. [2024-06-27 21:52:14,587 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 112 selfloop transitions, 43 changer transitions 0/175 dead transitions. [2024-06-27 21:52:14,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 175 transitions, 2120 flow [2024-06-27 21:52:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:52:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:52:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-27 21:52:14,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7137681159420289 [2024-06-27 21:52:14,589 INFO L175 Difference]: Start difference. First operand has 157 places, 136 transitions, 1646 flow. Second operand 6 states and 197 transitions. [2024-06-27 21:52:14,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 175 transitions, 2120 flow [2024-06-27 21:52:14,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 175 transitions, 2009 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:14,690 INFO L231 Difference]: Finished difference. Result has 157 places, 137 transitions, 1641 flow [2024-06-27 21:52:14,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1641, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2024-06-27 21:52:14,690 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 21:52:14,691 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 1641 flow [2024-06-27 21:52:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:14,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:14,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:52:14,691 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:14,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1059566073, now seen corresponding path program 4 times [2024-06-27 21:52:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:14,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993880959] [2024-06-27 21:52:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:14,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:14,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993880959] [2024-06-27 21:52:14,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993880959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:14,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123060101] [2024-06-27 21:52:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:14,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-27 21:52:14,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 1641 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:14,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:14,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-27 21:52:14,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:15,806 INFO L124 PetriNetUnfolderBase]: 5225/9602 cut-off events. [2024-06-27 21:52:15,806 INFO L125 PetriNetUnfolderBase]: For 60118/60270 co-relation queries the response was YES. [2024-06-27 21:52:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38115 conditions, 9602 events. 5225/9602 cut-off events. For 60118/60270 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 83946 event pairs, 2031 based on Foata normal form. 50/9349 useless extension candidates. Maximal degree in co-relation 38055. Up to 5346 conditions per place. [2024-06-27 21:52:15,866 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 115 selfloop transitions, 47 changer transitions 0/182 dead transitions. [2024-06-27 21:52:15,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 182 transitions, 2157 flow [2024-06-27 21:52:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-27 21:52:15,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7018633540372671 [2024-06-27 21:52:15,868 INFO L175 Difference]: Start difference. First operand has 157 places, 137 transitions, 1641 flow. Second operand 7 states and 226 transitions. [2024-06-27 21:52:15,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 182 transitions, 2157 flow [2024-06-27 21:52:15,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 182 transitions, 2061 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:15,962 INFO L231 Difference]: Finished difference. Result has 158 places, 137 transitions, 1644 flow [2024-06-27 21:52:15,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1644, PETRI_PLACES=158, PETRI_TRANSITIONS=137} [2024-06-27 21:52:15,963 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-06-27 21:52:15,963 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 137 transitions, 1644 flow [2024-06-27 21:52:15,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:15,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:15,963 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] [2024-06-27 21:52:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:52:15,963 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:15,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1510690104, now seen corresponding path program 1 times [2024-06-27 21:52:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937874934] [2024-06-27 21:52:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:16,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937874934] [2024-06-27 21:52:16,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937874934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:16,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:16,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87614609] [2024-06-27 21:52:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:16,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:16,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:16,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 137 transitions, 1644 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:16,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:16,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:16,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:17,382 INFO L124 PetriNetUnfolderBase]: 7460/13050 cut-off events. [2024-06-27 21:52:17,382 INFO L125 PetriNetUnfolderBase]: For 67044/67067 co-relation queries the response was YES. [2024-06-27 21:52:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50509 conditions, 13050 events. 7460/13050 cut-off events. For 67044/67067 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 112307 event pairs, 3887 based on Foata normal form. 19/12626 useless extension candidates. Maximal degree in co-relation 50450. Up to 11145 conditions per place. [2024-06-27 21:52:17,462 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 137 selfloop transitions, 51 changer transitions 0/203 dead transitions. [2024-06-27 21:52:17,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 203 transitions, 2553 flow [2024-06-27 21:52:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 21:52:17,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 21:52:17,463 INFO L175 Difference]: Start difference. First operand has 158 places, 137 transitions, 1644 flow. Second operand 8 states and 233 transitions. [2024-06-27 21:52:17,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 203 transitions, 2553 flow [2024-06-27 21:52:17,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 203 transitions, 2385 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:52:17,780 INFO L231 Difference]: Finished difference. Result has 161 places, 158 transitions, 1957 flow [2024-06-27 21:52:17,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1957, PETRI_PLACES=161, PETRI_TRANSITIONS=158} [2024-06-27 21:52:17,780 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-06-27 21:52:17,780 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 158 transitions, 1957 flow [2024-06-27 21:52:17,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:17,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:17,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:52:17,781 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:17,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash 509966834, now seen corresponding path program 2 times [2024-06-27 21:52:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:17,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368263882] [2024-06-27 21:52:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:17,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368263882] [2024-06-27 21:52:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368263882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:17,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640026569] [2024-06-27 21:52:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:17,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:17,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 158 transitions, 1957 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:17,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:17,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:17,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:19,498 INFO L124 PetriNetUnfolderBase]: 7621/13302 cut-off events. [2024-06-27 21:52:19,508 INFO L125 PetriNetUnfolderBase]: For 71284/71307 co-relation queries the response was YES. [2024-06-27 21:52:19,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52221 conditions, 13302 events. 7621/13302 cut-off events. For 71284/71307 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 114473 event pairs, 3957 based on Foata normal form. 19/12868 useless extension candidates. Maximal degree in co-relation 52161. Up to 11672 conditions per place. [2024-06-27 21:52:19,592 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 138 selfloop transitions, 52 changer transitions 0/205 dead transitions. [2024-06-27 21:52:19,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 2636 flow [2024-06-27 21:52:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 21:52:19,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 21:52:19,594 INFO L175 Difference]: Start difference. First operand has 161 places, 158 transitions, 1957 flow. Second operand 8 states and 227 transitions. [2024-06-27 21:52:19,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 2636 flow [2024-06-27 21:52:19,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 205 transitions, 2595 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 21:52:19,750 INFO L231 Difference]: Finished difference. Result has 169 places, 167 transitions, 2185 flow [2024-06-27 21:52:19,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2185, PETRI_PLACES=169, PETRI_TRANSITIONS=167} [2024-06-27 21:52:19,751 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-27 21:52:19,751 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 167 transitions, 2185 flow [2024-06-27 21:52:19,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:19,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:19,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:19,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:52:19,751 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:19,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2116448154, now seen corresponding path program 3 times [2024-06-27 21:52:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:19,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356942611] [2024-06-27 21:52:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356942611] [2024-06-27 21:52:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356942611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:19,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:52:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342878009] [2024-06-27 21:52:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:52:19,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:52:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:52:19,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:20,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 167 transitions, 2185 flow. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:20,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:20,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:20,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:21,628 INFO L124 PetriNetUnfolderBase]: 7821/13551 cut-off events. [2024-06-27 21:52:21,628 INFO L125 PetriNetUnfolderBase]: For 76969/77008 co-relation queries the response was YES. [2024-06-27 21:52:21,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54465 conditions, 13551 events. 7821/13551 cut-off events. For 76969/77008 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 116404 event pairs, 4208 based on Foata normal form. 19/13106 useless extension candidates. Maximal degree in co-relation 54402. Up to 11937 conditions per place. [2024-06-27 21:52:21,715 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 146 selfloop transitions, 81 changer transitions 0/242 dead transitions. [2024-06-27 21:52:21,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 242 transitions, 3440 flow [2024-06-27 21:52:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:52:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:52:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 21:52:21,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-06-27 21:52:21,717 INFO L175 Difference]: Start difference. First operand has 169 places, 167 transitions, 2185 flow. Second operand 9 states and 246 transitions. [2024-06-27 21:52:21,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 242 transitions, 3440 flow [2024-06-27 21:52:21,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 3272 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:52:21,867 INFO L231 Difference]: Finished difference. Result has 178 places, 204 transitions, 2907 flow [2024-06-27 21:52:21,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2907, PETRI_PLACES=178, PETRI_TRANSITIONS=204} [2024-06-27 21:52:21,868 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 128 predicate places. [2024-06-27 21:52:21,868 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 204 transitions, 2907 flow [2024-06-27 21:52:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:21,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:21,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:21,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:52:21,869 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:21,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1872155884, now seen corresponding path program 4 times [2024-06-27 21:52:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686965957] [2024-06-27 21:52:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:22,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686965957] [2024-06-27 21:52:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686965957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:22,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:22,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018131620] [2024-06-27 21:52:22,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:22,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:22,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:22,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:22,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:22,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 204 transitions, 2907 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:22,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:22,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:22,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:23,885 INFO L124 PetriNetUnfolderBase]: 7895/13715 cut-off events. [2024-06-27 21:52:23,885 INFO L125 PetriNetUnfolderBase]: For 83177/83200 co-relation queries the response was YES. [2024-06-27 21:52:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56895 conditions, 13715 events. 7895/13715 cut-off events. For 83177/83200 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 118130 event pairs, 4204 based on Foata normal form. 19/13260 useless extension candidates. Maximal degree in co-relation 56827. Up to 11894 conditions per place. [2024-06-27 21:52:23,969 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 139 selfloop transitions, 86 changer transitions 0/240 dead transitions. [2024-06-27 21:52:23,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 3552 flow [2024-06-27 21:52:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 21:52:23,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 21:52:23,970 INFO L175 Difference]: Start difference. First operand has 178 places, 204 transitions, 2907 flow. Second operand 8 states and 225 transitions. [2024-06-27 21:52:23,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 3552 flow [2024-06-27 21:52:24,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 240 transitions, 3463 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 21:52:24,165 INFO L231 Difference]: Finished difference. Result has 187 places, 208 transitions, 3109 flow [2024-06-27 21:52:24,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3109, PETRI_PLACES=187, PETRI_TRANSITIONS=208} [2024-06-27 21:52:24,166 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 137 predicate places. [2024-06-27 21:52:24,166 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 208 transitions, 3109 flow [2024-06-27 21:52:24,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:24,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:24,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:24,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:52:24,167 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:24,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1723286924, now seen corresponding path program 5 times [2024-06-27 21:52:24,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:24,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089248150] [2024-06-27 21:52:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:24,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:24,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089248150] [2024-06-27 21:52:24,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089248150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:24,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:24,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179423376] [2024-06-27 21:52:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:24,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:24,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:24,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 208 transitions, 3109 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:24,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:24,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:24,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:26,410 INFO L124 PetriNetUnfolderBase]: 8194/14356 cut-off events. [2024-06-27 21:52:26,410 INFO L125 PetriNetUnfolderBase]: For 94664/94693 co-relation queries the response was YES. [2024-06-27 21:52:26,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60107 conditions, 14356 events. 8194/14356 cut-off events. For 94664/94693 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 124603 event pairs, 4295 based on Foata normal form. 27/13903 useless extension candidates. Maximal degree in co-relation 60035. Up to 12230 conditions per place. [2024-06-27 21:52:26,501 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 159 selfloop transitions, 94 changer transitions 0/268 dead transitions. [2024-06-27 21:52:26,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 268 transitions, 4183 flow [2024-06-27 21:52:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 21:52:26,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-06-27 21:52:26,502 INFO L175 Difference]: Start difference. First operand has 187 places, 208 transitions, 3109 flow. Second operand 8 states and 229 transitions. [2024-06-27 21:52:26,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 268 transitions, 4183 flow [2024-06-27 21:52:26,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 268 transitions, 4004 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:52:26,762 INFO L231 Difference]: Finished difference. Result has 195 places, 226 transitions, 3532 flow [2024-06-27 21:52:26,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3532, PETRI_PLACES=195, PETRI_TRANSITIONS=226} [2024-06-27 21:52:26,762 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-06-27 21:52:26,763 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 226 transitions, 3532 flow [2024-06-27 21:52:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:52:26,763 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:26,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1181919368, now seen corresponding path program 6 times [2024-06-27 21:52:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:26,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237668208] [2024-06-27 21:52:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:26,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:26,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237668208] [2024-06-27 21:52:26,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237668208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:26,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:26,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754151106] [2024-06-27 21:52:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:26,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:26,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:26,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 226 transitions, 3532 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:26,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:26,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:26,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:28,799 INFO L124 PetriNetUnfolderBase]: 8268/14341 cut-off events. [2024-06-27 21:52:28,799 INFO L125 PetriNetUnfolderBase]: For 96293/96314 co-relation queries the response was YES. [2024-06-27 21:52:28,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60992 conditions, 14341 events. 8268/14341 cut-off events. For 96293/96314 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 124287 event pairs, 4415 based on Foata normal form. 21/13865 useless extension candidates. Maximal degree in co-relation 60916. Up to 12630 conditions per place. [2024-06-27 21:52:28,914 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 158 selfloop transitions, 90 changer transitions 0/263 dead transitions. [2024-06-27 21:52:28,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 4234 flow [2024-06-27 21:52:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 21:52:28,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 21:52:28,916 INFO L175 Difference]: Start difference. First operand has 195 places, 226 transitions, 3532 flow. Second operand 8 states and 223 transitions. [2024-06-27 21:52:28,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 4234 flow [2024-06-27 21:52:29,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 263 transitions, 4184 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-27 21:52:29,204 INFO L231 Difference]: Finished difference. Result has 204 places, 229 transitions, 3736 flow [2024-06-27 21:52:29,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3736, PETRI_PLACES=204, PETRI_TRANSITIONS=229} [2024-06-27 21:52:29,205 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2024-06-27 21:52:29,205 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 229 transitions, 3736 flow [2024-06-27 21:52:29,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:29,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:29,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:29,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:52:29,205 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:29,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash -586389398, now seen corresponding path program 7 times [2024-06-27 21:52:29,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:29,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943219887] [2024-06-27 21:52:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:29,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:29,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943219887] [2024-06-27 21:52:29,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943219887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:29,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087353181] [2024-06-27 21:52:29,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:29,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:29,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:29,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:29,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:29,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 229 transitions, 3736 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:29,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:29,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:29,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:31,338 INFO L124 PetriNetUnfolderBase]: 8448/14614 cut-off events. [2024-06-27 21:52:31,338 INFO L125 PetriNetUnfolderBase]: For 101190/101211 co-relation queries the response was YES. [2024-06-27 21:52:31,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62513 conditions, 14614 events. 8448/14614 cut-off events. For 101190/101211 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 126428 event pairs, 3707 based on Foata normal form. 21/14159 useless extension candidates. Maximal degree in co-relation 62433. Up to 11165 conditions per place. [2024-06-27 21:52:31,449 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 149 selfloop transitions, 116 changer transitions 0/280 dead transitions. [2024-06-27 21:52:31,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 280 transitions, 4622 flow [2024-06-27 21:52:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 21:52:31,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-27 21:52:31,450 INFO L175 Difference]: Start difference. First operand has 204 places, 229 transitions, 3736 flow. Second operand 8 states and 235 transitions. [2024-06-27 21:52:31,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 280 transitions, 4622 flow [2024-06-27 21:52:31,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 280 transitions, 4432 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:52:31,999 INFO L231 Difference]: Finished difference. Result has 210 places, 234 transitions, 3914 flow [2024-06-27 21:52:31,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3914, PETRI_PLACES=210, PETRI_TRANSITIONS=234} [2024-06-27 21:52:31,999 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-27 21:52:31,999 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 234 transitions, 3914 flow [2024-06-27 21:52:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:31,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:31,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:52:32,000 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:32,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash -575289848, now seen corresponding path program 8 times [2024-06-27 21:52:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:32,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867413697] [2024-06-27 21:52:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:32,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:32,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867413697] [2024-06-27 21:52:32,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867413697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:32,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:32,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:32,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460802922] [2024-06-27 21:52:32,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:32,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:32,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:32,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:32,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 234 transitions, 3914 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:32,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:32,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:32,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:34,365 INFO L124 PetriNetUnfolderBase]: 8662/15038 cut-off events. [2024-06-27 21:52:34,366 INFO L125 PetriNetUnfolderBase]: For 114462/114483 co-relation queries the response was YES. [2024-06-27 21:52:34,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66209 conditions, 15038 events. 8662/15038 cut-off events. For 114462/114483 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 131132 event pairs, 3803 based on Foata normal form. 21/14569 useless extension candidates. Maximal degree in co-relation 66126. Up to 11241 conditions per place. [2024-06-27 21:52:34,468 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 149 selfloop transitions, 121 changer transitions 0/285 dead transitions. [2024-06-27 21:52:34,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 285 transitions, 4836 flow [2024-06-27 21:52:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 21:52:34,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 21:52:34,469 INFO L175 Difference]: Start difference. First operand has 210 places, 234 transitions, 3914 flow. Second operand 8 states and 233 transitions. [2024-06-27 21:52:34,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 285 transitions, 4836 flow [2024-06-27 21:52:34,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 285 transitions, 4704 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 21:52:34,803 INFO L231 Difference]: Finished difference. Result has 218 places, 240 transitions, 4147 flow [2024-06-27 21:52:34,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4147, PETRI_PLACES=218, PETRI_TRANSITIONS=240} [2024-06-27 21:52:34,804 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-27 21:52:34,804 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 240 transitions, 4147 flow [2024-06-27 21:52:34,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:34,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:34,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:34,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:52:34,805 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:34,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash -202158968, now seen corresponding path program 9 times [2024-06-27 21:52:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:34,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090516238] [2024-06-27 21:52:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:34,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090516238] [2024-06-27 21:52:34,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090516238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:34,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359177793] [2024-06-27 21:52:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:35,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:35,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 240 transitions, 4147 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:35,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:35,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:37,165 INFO L124 PetriNetUnfolderBase]: 8649/15180 cut-off events. [2024-06-27 21:52:37,165 INFO L125 PetriNetUnfolderBase]: For 115376/115387 co-relation queries the response was YES. [2024-06-27 21:52:37,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67116 conditions, 15180 events. 8649/15180 cut-off events. For 115376/115387 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 133614 event pairs, 4349 based on Foata normal form. 16/14687 useless extension candidates. Maximal degree in co-relation 67029. Up to 13189 conditions per place. [2024-06-27 21:52:37,274 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 239 selfloop transitions, 26 changer transitions 0/280 dead transitions. [2024-06-27 21:52:37,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 280 transitions, 4831 flow [2024-06-27 21:52:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 21:52:37,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-27 21:52:37,276 INFO L175 Difference]: Start difference. First operand has 218 places, 240 transitions, 4147 flow. Second operand 8 states and 224 transitions. [2024-06-27 21:52:37,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 280 transitions, 4831 flow [2024-06-27 21:52:37,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 280 transitions, 4627 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:52:37,642 INFO L231 Difference]: Finished difference. Result has 224 places, 241 transitions, 4014 flow [2024-06-27 21:52:37,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4014, PETRI_PLACES=224, PETRI_TRANSITIONS=241} [2024-06-27 21:52:37,642 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-06-27 21:52:37,643 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 241 transitions, 4014 flow [2024-06-27 21:52:37,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:37,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:37,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:37,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:52:37,643 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:37,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1598261512, now seen corresponding path program 10 times [2024-06-27 21:52:37,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:37,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688989410] [2024-06-27 21:52:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:37,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:37,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:37,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688989410] [2024-06-27 21:52:37,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688989410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:37,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:37,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:37,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228350354] [2024-06-27 21:52:37,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:37,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:37,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 241 transitions, 4014 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:37,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:37,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:37,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:40,322 INFO L124 PetriNetUnfolderBase]: 9279/16477 cut-off events. [2024-06-27 21:52:40,323 INFO L125 PetriNetUnfolderBase]: For 136082/136117 co-relation queries the response was YES. [2024-06-27 21:52:40,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72939 conditions, 16477 events. 9279/16477 cut-off events. For 136082/136117 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 146928 event pairs, 4661 based on Foata normal form. 24/15974 useless extension candidates. Maximal degree in co-relation 72850. Up to 13312 conditions per place. [2024-06-27 21:52:40,445 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 179 selfloop transitions, 111 changer transitions 0/305 dead transitions. [2024-06-27 21:52:40,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 305 transitions, 5414 flow [2024-06-27 21:52:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 21:52:40,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-27 21:52:40,447 INFO L175 Difference]: Start difference. First operand has 224 places, 241 transitions, 4014 flow. Second operand 8 states and 227 transitions. [2024-06-27 21:52:40,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 305 transitions, 5414 flow [2024-06-27 21:52:40,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 305 transitions, 5160 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 21:52:40,824 INFO L231 Difference]: Finished difference. Result has 227 places, 261 transitions, 4488 flow [2024-06-27 21:52:40,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4488, PETRI_PLACES=227, PETRI_TRANSITIONS=261} [2024-06-27 21:52:40,825 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-06-27 21:52:40,825 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 261 transitions, 4488 flow [2024-06-27 21:52:40,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:40,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:40,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:40,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:52:40,826 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:40,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1598706982, now seen corresponding path program 11 times [2024-06-27 21:52:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:40,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400561285] [2024-06-27 21:52:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:40,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:40,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400561285] [2024-06-27 21:52:40,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400561285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:40,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:40,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576210073] [2024-06-27 21:52:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:40,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:41,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:41,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 261 transitions, 4488 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:41,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:41,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:41,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:43,365 INFO L124 PetriNetUnfolderBase]: 9266/16232 cut-off events. [2024-06-27 21:52:43,365 INFO L125 PetriNetUnfolderBase]: For 130991/131018 co-relation queries the response was YES. [2024-06-27 21:52:43,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73065 conditions, 16232 events. 9266/16232 cut-off events. For 130991/131018 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 144301 event pairs, 4797 based on Foata normal form. 21/15711 useless extension candidates. Maximal degree in co-relation 72975. Up to 14238 conditions per place. [2024-06-27 21:52:43,490 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 255 selfloop transitions, 28 changer transitions 0/298 dead transitions. [2024-06-27 21:52:43,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 298 transitions, 5230 flow [2024-06-27 21:52:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-27 21:52:43,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-06-27 21:52:43,492 INFO L175 Difference]: Start difference. First operand has 227 places, 261 transitions, 4488 flow. Second operand 8 states and 219 transitions. [2024-06-27 21:52:43,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 298 transitions, 5230 flow [2024-06-27 21:52:43,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 298 transitions, 5160 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 21:52:43,940 INFO L231 Difference]: Finished difference. Result has 235 places, 264 transitions, 4529 flow [2024-06-27 21:52:43,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4529, PETRI_PLACES=235, PETRI_TRANSITIONS=264} [2024-06-27 21:52:43,941 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 185 predicate places. [2024-06-27 21:52:43,941 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 264 transitions, 4529 flow [2024-06-27 21:52:43,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:43,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:43,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:52:43,942 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:43,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1285474198, now seen corresponding path program 12 times [2024-06-27 21:52:43,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221650150] [2024-06-27 21:52:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221650150] [2024-06-27 21:52:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221650150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264090351] [2024-06-27 21:52:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:44,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:44,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 264 transitions, 4529 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:44,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:44,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:44,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:46,902 INFO L124 PetriNetUnfolderBase]: 9253/16295 cut-off events. [2024-06-27 21:52:46,902 INFO L125 PetriNetUnfolderBase]: For 129208/129245 co-relation queries the response was YES. [2024-06-27 21:52:46,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72801 conditions, 16295 events. 9253/16295 cut-off events. For 129208/129245 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 145084 event pairs, 4842 based on Foata normal form. 24/15780 useless extension candidates. Maximal degree in co-relation 72708. Up to 14052 conditions per place. [2024-06-27 21:52:47,031 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 180 selfloop transitions, 102 changer transitions 0/297 dead transitions. [2024-06-27 21:52:47,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 297 transitions, 5259 flow [2024-06-27 21:52:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:52:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:52:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 21:52:47,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 21:52:47,032 INFO L175 Difference]: Start difference. First operand has 235 places, 264 transitions, 4529 flow. Second operand 8 states and 220 transitions. [2024-06-27 21:52:47,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 297 transitions, 5259 flow [2024-06-27 21:52:47,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 297 transitions, 5190 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:52:47,472 INFO L231 Difference]: Finished difference. Result has 241 places, 265 transitions, 4698 flow [2024-06-27 21:52:47,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4698, PETRI_PLACES=241, PETRI_TRANSITIONS=265} [2024-06-27 21:52:47,472 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-06-27 21:52:47,472 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 265 transitions, 4698 flow [2024-06-27 21:52:47,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:47,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:47,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:47,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:52:47,473 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:47,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:47,473 INFO L85 PathProgramCache]: Analyzing trace with hash -591961720, now seen corresponding path program 13 times [2024-06-27 21:52:47,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:47,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062519715] [2024-06-27 21:52:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:47,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:47,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062519715] [2024-06-27 21:52:47,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062519715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:47,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:47,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233521320] [2024-06-27 21:52:47,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:47,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:47,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:47,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 265 transitions, 4698 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:47,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:47,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:47,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:50,142 INFO L124 PetriNetUnfolderBase]: 9240/16212 cut-off events. [2024-06-27 21:52:50,142 INFO L125 PetriNetUnfolderBase]: For 128429/128465 co-relation queries the response was YES. [2024-06-27 21:52:50,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72686 conditions, 16212 events. 9240/16212 cut-off events. For 128429/128465 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 144339 event pairs, 4723 based on Foata normal form. 22/15696 useless extension candidates. Maximal degree in co-relation 72591. Up to 13452 conditions per place. [2024-06-27 21:52:50,275 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 166 selfloop transitions, 122 changer transitions 0/303 dead transitions. [2024-06-27 21:52:50,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 303 transitions, 5438 flow [2024-06-27 21:52:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 21:52:50,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-27 21:52:50,276 INFO L175 Difference]: Start difference. First operand has 241 places, 265 transitions, 4698 flow. Second operand 7 states and 208 transitions. [2024-06-27 21:52:50,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 303 transitions, 5438 flow [2024-06-27 21:52:51,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 303 transitions, 5179 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:52:51,087 INFO L231 Difference]: Finished difference. Result has 243 places, 266 transitions, 4749 flow [2024-06-27 21:52:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4749, PETRI_PLACES=243, PETRI_TRANSITIONS=266} [2024-06-27 21:52:51,087 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 193 predicate places. [2024-06-27 21:52:51,087 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 266 transitions, 4749 flow [2024-06-27 21:52:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:51,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:52:51,088 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:51,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 644112264, now seen corresponding path program 14 times [2024-06-27 21:52:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629019970] [2024-06-27 21:52:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629019970] [2024-06-27 21:52:51,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629019970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:51,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:51,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:52:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067251476] [2024-06-27 21:52:51,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:52:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:52:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:52:51,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:51,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 266 transitions, 4749 flow. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:51,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:51,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:51,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:53,675 INFO L124 PetriNetUnfolderBase]: 9567/16684 cut-off events. [2024-06-27 21:52:53,676 INFO L125 PetriNetUnfolderBase]: For 140640/140694 co-relation queries the response was YES. [2024-06-27 21:52:53,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77451 conditions, 16684 events. 9567/16684 cut-off events. For 140640/140694 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 148547 event pairs, 4979 based on Foata normal form. 20/16129 useless extension candidates. Maximal degree in co-relation 77354. Up to 14461 conditions per place. [2024-06-27 21:52:53,820 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 195 selfloop transitions, 139 changer transitions 0/349 dead transitions. [2024-06-27 21:52:53,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 349 transitions, 6712 flow [2024-06-27 21:52:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:52:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:52:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 21:52:53,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-27 21:52:53,822 INFO L175 Difference]: Start difference. First operand has 243 places, 266 transitions, 4749 flow. Second operand 9 states and 244 transitions. [2024-06-27 21:52:53,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 349 transitions, 6712 flow [2024-06-27 21:52:54,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 349 transitions, 6404 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:52:54,678 INFO L231 Difference]: Finished difference. Result has 250 places, 310 transitions, 5874 flow [2024-06-27 21:52:54,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5874, PETRI_PLACES=250, PETRI_TRANSITIONS=310} [2024-06-27 21:52:54,679 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-06-27 21:52:54,679 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 310 transitions, 5874 flow [2024-06-27 21:52:54,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:54,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:54,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:54,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:52:54,680 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:54,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash -381270804, now seen corresponding path program 15 times [2024-06-27 21:52:54,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:54,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722036803] [2024-06-27 21:52:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:54,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722036803] [2024-06-27 21:52:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722036803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:52:54,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:52:54,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:52:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061915062] [2024-06-27 21:52:54,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:52:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:52:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:52:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:52:54,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-27 21:52:54,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 310 transitions, 5874 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:54,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:54,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-27 21:52:54,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:57,561 INFO L124 PetriNetUnfolderBase]: 9554/16809 cut-off events. [2024-06-27 21:52:57,562 INFO L125 PetriNetUnfolderBase]: For 137069/137130 co-relation queries the response was YES. [2024-06-27 21:52:57,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77207 conditions, 16809 events. 9554/16809 cut-off events. For 137069/137130 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 149777 event pairs, 4778 based on Foata normal form. 32/16279 useless extension candidates. Maximal degree in co-relation 77107. Up to 13701 conditions per place. [2024-06-27 21:52:57,701 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 175 selfloop transitions, 156 changer transitions 0/346 dead transitions. [2024-06-27 21:52:57,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 346 transitions, 6690 flow [2024-06-27 21:52:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:52:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:52:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 21:52:57,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 21:52:57,703 INFO L175 Difference]: Start difference. First operand has 250 places, 310 transitions, 5874 flow. Second operand 7 states and 204 transitions. [2024-06-27 21:52:57,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 346 transitions, 6690 flow [2024-06-27 21:52:58,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 346 transitions, 6508 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-27 21:52:58,201 INFO L231 Difference]: Finished difference. Result has 256 places, 310 transitions, 6016 flow [2024-06-27 21:52:58,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6016, PETRI_PLACES=256, PETRI_TRANSITIONS=310} [2024-06-27 21:52:58,202 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 206 predicate places. [2024-06-27 21:52:58,202 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 310 transitions, 6016 flow [2024-06-27 21:52:58,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:58,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:58,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:52:58,202 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:52:58,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1775513652, now seen corresponding path program 16 times [2024-06-27 21:52:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41052427] [2024-06-27 21:52:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat