./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe004_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:13:27,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:13:27,131 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:13:27,137 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:13:27,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:13:27,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:13:27,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:13:27,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:13:27,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:13:27,170 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:13:27,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:13:27,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:13:27,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:13:27,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:13:27,173 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:13:27,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:13:27,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:13:27,173 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:13:27,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:13:27,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:13:27,174 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:13:27,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:13:27,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:13:27,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:13:27,175 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:13:27,175 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:13:27,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:13:27,176 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:13:27,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:13:27,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:13:27,178 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:13:27,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:13:27,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:27,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:13:27,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:13:27,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:13:27,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:13:27,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:13:27,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:13:27,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:13:27,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:13:27,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:13:27,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:13:27,180 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:13:27,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:13:27,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:13:27,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:13:27,433 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:13:27,433 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:13:27,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-20 15:13:28,512 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:13:28,718 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:13:28,718 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-20 15:13:28,730 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2091220d8/88bdf68b13f047b3ae5a0bbcec973678/FLAGbf7346cd8 [2024-06-20 15:13:28,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2091220d8/88bdf68b13f047b3ae5a0bbcec973678 [2024-06-20 15:13:28,744 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:13:28,744 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:13:28,745 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml [2024-06-20 15:13:28,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:13:28,849 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:13:28,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:28,851 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:13:28,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:13:28,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:28" (1/2) ... [2024-06-20 15:13:28,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507837b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:28, skipping insertion in model container [2024-06-20 15:13:28,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:28" (1/2) ... [2024-06-20 15:13:28,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@429bffe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:28, skipping insertion in model container [2024-06-20 15:13:28,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:28" (2/2) ... [2024-06-20 15:13:28,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507837b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:28, skipping insertion in model container [2024-06-20 15:13:28,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:28" (2/2) ... [2024-06-20 15:13:28,859 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:13:28,892 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:13:28,893 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:13:28,893 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:13:28,894 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:13:28,894 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:13:28,894 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-20 15:13:28,939 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:13:29,249 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:29,258 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:13:29,375 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:29,416 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:13:29,417 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29 WrapperNode [2024-06-20 15:13:29,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:29,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:29,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:13:29,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:13:29,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,448 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,489 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-20 15:13:29,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:29,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:13:29,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:13:29,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:13:29,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,528 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]. [2024-06-20 15:13:29,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,532 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,535 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,536 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,537 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:13:29,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:13:29,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:13:29,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:13:29,540 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (1/1) ... [2024-06-20 15:13:29,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:29,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:13:29,585 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) [2024-06-20 15:13:29,588 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 [2024-06-20 15:13:29,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:13:29,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:13:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:13:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:13:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:13:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:13:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:13:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:13:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:13:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:13:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:13:29,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:13:29,615 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:13:29,701 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:13:29,703 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:13:29,975 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:13:29,975 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:13:30,052 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:13:30,053 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:13:30,053 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:30 BoogieIcfgContainer [2024-06-20 15:13:30,053 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:13:30,055 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:13:30,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:13:30,057 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:13:30,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:13:28" (1/4) ... [2024-06-20 15:13:30,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a6f183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:30, skipping insertion in model container [2024-06-20 15:13:30,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:28" (2/4) ... [2024-06-20 15:13:30,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a6f183 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:30, skipping insertion in model container [2024-06-20 15:13:30,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:29" (3/4) ... [2024-06-20 15:13:30,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a6f183 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:30, skipping insertion in model container [2024-06-20 15:13:30,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:30" (4/4) ... [2024-06-20 15:13:30,059 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-06-20 15:13:30,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:13:30,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:13:30,073 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:13:30,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:13:30,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:30,147 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 15:13:30,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:30,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:13:30,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:30,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 15:13:30,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:13:30,164 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;@21638005, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:13:30,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:13:30,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:13:30,168 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:13:30,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:30,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:30,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:13:30,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:30,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:30,173 INFO L85 PathProgramCache]: Analyzing trace with hash 218856700, now seen corresponding path program 1 times [2024-06-20 15:13:30,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794266173] [2024-06-20 15:13:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:30,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794266173] [2024-06-20 15:13:30,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794266173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:13:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070159340] [2024-06-20 15:13:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:13:30,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:13:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:13:30,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:13:30,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:30,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:30,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:13:30,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:30,785 INFO L124 PetriNetUnfolderBase]: 606/1001 cut-off events. [2024-06-20 15:13:30,785 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 15:13:30,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 1001 events. 606/1001 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5021 event pairs, 384 based on Foata normal form. 1/957 useless extension candidates. Maximal degree in co-relation 2005. Up to 941 conditions per place. [2024-06-20 15:13:30,797 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 15:13:30,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-20 15:13:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:13:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:13:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-20 15:13:30,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-20 15:13:30,811 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-20 15:13:30,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-20 15:13:30,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:30,816 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:30,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 15:13:30,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 15:13:30,820 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:30,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:30,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:30,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:30,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:13:30,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:30,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -131900529, now seen corresponding path program 1 times [2024-06-20 15:13:30,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:30,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015051435] [2024-06-20 15:13:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:30,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015051435] [2024-06-20 15:13:31,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015051435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:31,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664483547] [2024-06-20 15:13:31,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:31,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,275 INFO L124 PetriNetUnfolderBase]: 934/1509 cut-off events. [2024-06-20 15:13:31,276 INFO L125 PetriNetUnfolderBase]: For 300/348 co-relation queries the response was YES. [2024-06-20 15:13:31,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 1509 events. 934/1509 cut-off events. For 300/348 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7384 event pairs, 530 based on Foata normal form. 3/1482 useless extension candidates. Maximal degree in co-relation 3413. Up to 1399 conditions per place. [2024-06-20 15:13:31,286 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 15:13:31,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 248 flow [2024-06-20 15:13:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 15:13:31,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-20 15:13:31,294 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 103 transitions. [2024-06-20 15:13:31,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 248 flow [2024-06-20 15:13:31,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:31,298 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-20 15:13:31,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-20 15:13:31,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 15:13:31,299 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-20 15:13:31,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:13:31,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:31,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash 206052061, now seen corresponding path program 1 times [2024-06-20 15:13:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256072604] [2024-06-20 15:13:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256072604] [2024-06-20 15:13:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256072604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296933861] [2024-06-20 15:13:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:31,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,664 INFO L124 PetriNetUnfolderBase]: 972/1587 cut-off events. [2024-06-20 15:13:31,664 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-06-20 15:13:31,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 1587 events. 972/1587 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7859 event pairs, 304 based on Foata normal form. 7/1585 useless extension candidates. Maximal degree in co-relation 3986. Up to 1312 conditions per place. [2024-06-20 15:13:31,675 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-20 15:13:31,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 81 transitions, 424 flow [2024-06-20 15:13:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 15:13:31,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-20 15:13:31,680 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 140 transitions. [2024-06-20 15:13:31,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 81 transitions, 424 flow [2024-06-20 15:13:31,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 422 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:31,684 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 276 flow [2024-06-20 15:13:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-06-20 15:13:31,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-20 15:13:31,686 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 276 flow [2024-06-20 15:13:31,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:13:31,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:31,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -410706608, now seen corresponding path program 1 times [2024-06-20 15:13:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032992412] [2024-06-20 15:13:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032992412] [2024-06-20 15:13:31,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032992412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040743968] [2024-06-20 15:13:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:31,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,086 INFO L124 PetriNetUnfolderBase]: 1054/1741 cut-off events. [2024-06-20 15:13:32,087 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-20 15:13:32,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 1741 events. 1054/1741 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8907 event pairs, 197 based on Foata normal form. 26/1758 useless extension candidates. Maximal degree in co-relation 5452. Up to 1290 conditions per place. [2024-06-20 15:13:32,098 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-20 15:13:32,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 91 transitions, 576 flow [2024-06-20 15:13:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 15:13:32,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-20 15:13:32,100 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 276 flow. Second operand 6 states and 164 transitions. [2024-06-20 15:13:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 91 transitions, 576 flow [2024-06-20 15:13:32,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 566 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:32,106 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 337 flow [2024-06-20 15:13:32,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-20 15:13:32,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 15:13:32,107 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 337 flow [2024-06-20 15:13:32,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:13:32,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:32,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1224206505, now seen corresponding path program 1 times [2024-06-20 15:13:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641541077] [2024-06-20 15:13:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641541077] [2024-06-20 15:13:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641541077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:32,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723744823] [2024-06-20 15:13:32,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:32,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:32,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:32,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:13:32,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:13:32,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,338 INFO L124 PetriNetUnfolderBase]: 801/1435 cut-off events. [2024-06-20 15:13:32,338 INFO L125 PetriNetUnfolderBase]: For 2705/2739 co-relation queries the response was YES. [2024-06-20 15:13:32,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 1435 events. 801/1435 cut-off events. For 2705/2739 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7864 event pairs, 231 based on Foata normal form. 4/1396 useless extension candidates. Maximal degree in co-relation 4794. Up to 1191 conditions per place. [2024-06-20 15:13:32,348 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 46 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-06-20 15:13:32,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 505 flow [2024-06-20 15:13:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-20 15:13:32,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:32,350 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 337 flow. Second operand 4 states and 104 transitions. [2024-06-20 15:13:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 505 flow [2024-06-20 15:13:32,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 454 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:32,355 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 352 flow [2024-06-20 15:13:32,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-06-20 15:13:32,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 15:13:32,356 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 352 flow [2024-06-20 15:13:32,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:13:32,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:32,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash 703353189, now seen corresponding path program 1 times [2024-06-20 15:13:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010729655] [2024-06-20 15:13:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010729655] [2024-06-20 15:13:32,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010729655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:32,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950074544] [2024-06-20 15:13:32,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:32,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:32,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:32,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:32,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,635 INFO L124 PetriNetUnfolderBase]: 1050/1746 cut-off events. [2024-06-20 15:13:32,636 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2024-06-20 15:13:32,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1746 events. 1050/1746 cut-off events. For 3995/3995 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9025 event pairs, 307 based on Foata normal form. 6/1746 useless extension candidates. Maximal degree in co-relation 6073. Up to 1463 conditions per place. [2024-06-20 15:13:32,648 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 24 changer transitions 0/85 dead transitions. [2024-06-20 15:13:32,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 635 flow [2024-06-20 15:13:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 15:13:32,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-20 15:13:32,650 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 352 flow. Second operand 5 states and 132 transitions. [2024-06-20 15:13:32,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 635 flow [2024-06-20 15:13:32,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 602 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:32,654 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 434 flow [2024-06-20 15:13:32,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-06-20 15:13:32,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-20 15:13:32,655 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 434 flow [2024-06-20 15:13:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:13:32,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:32,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1439788116, now seen corresponding path program 1 times [2024-06-20 15:13:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566571023] [2024-06-20 15:13:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566571023] [2024-06-20 15:13:32,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566571023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:32,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674638812] [2024-06-20 15:13:32,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:32,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:32,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:32,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,945 INFO L124 PetriNetUnfolderBase]: 1053/1743 cut-off events. [2024-06-20 15:13:32,945 INFO L125 PetriNetUnfolderBase]: For 4867/4867 co-relation queries the response was YES. [2024-06-20 15:13:32,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6522 conditions, 1743 events. 1053/1743 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8960 event pairs, 333 based on Foata normal form. 4/1739 useless extension candidates. Maximal degree in co-relation 6496. Up to 1457 conditions per place. [2024-06-20 15:13:32,958 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 26 changer transitions 0/91 dead transitions. [2024-06-20 15:13:32,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 735 flow [2024-06-20 15:13:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 15:13:32,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-06-20 15:13:32,959 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 434 flow. Second operand 5 states and 134 transitions. [2024-06-20 15:13:32,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 735 flow [2024-06-20 15:13:32,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 702 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:32,965 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 496 flow [2024-06-20 15:13:32,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2024-06-20 15:13:32,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-20 15:13:32,966 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 496 flow [2024-06-20 15:13:32,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:13:32,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:32,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 255447820, now seen corresponding path program 2 times [2024-06-20 15:13:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784215746] [2024-06-20 15:13:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784215746] [2024-06-20 15:13:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784215746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:33,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686923937] [2024-06-20 15:13:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:33,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,248 INFO L124 PetriNetUnfolderBase]: 1018/1668 cut-off events. [2024-06-20 15:13:33,249 INFO L125 PetriNetUnfolderBase]: For 5967/5967 co-relation queries the response was YES. [2024-06-20 15:13:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6404 conditions, 1668 events. 1018/1668 cut-off events. For 5967/5967 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8366 event pairs, 335 based on Foata normal form. 4/1665 useless extension candidates. Maximal degree in co-relation 6376. Up to 1406 conditions per place. [2024-06-20 15:13:33,261 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 26 changer transitions 0/86 dead transitions. [2024-06-20 15:13:33,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 724 flow [2024-06-20 15:13:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:13:33,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-20 15:13:33,263 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 496 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:13:33,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 724 flow [2024-06-20 15:13:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 688 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:33,270 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 522 flow [2024-06-20 15:13:33,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=522, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-20 15:13:33,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-20 15:13:33,271 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 522 flow [2024-06-20 15:13:33,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:13:33,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:33,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1612568420, now seen corresponding path program 1 times [2024-06-20 15:13:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673031648] [2024-06-20 15:13:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673031648] [2024-06-20 15:13:33,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673031648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:33,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103940405] [2024-06-20 15:13:33,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:33,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:33,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,594 INFO L124 PetriNetUnfolderBase]: 1085/1783 cut-off events. [2024-06-20 15:13:33,594 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-20 15:13:33,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6860 conditions, 1783 events. 1085/1783 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9130 event pairs, 299 based on Foata normal form. 24/1800 useless extension candidates. Maximal degree in co-relation 6831. Up to 1391 conditions per place. [2024-06-20 15:13:33,611 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 30 changer transitions 0/97 dead transitions. [2024-06-20 15:13:33,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 97 transitions, 820 flow [2024-06-20 15:13:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:13:33,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:13:33,612 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 522 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:13:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 97 transitions, 820 flow [2024-06-20 15:13:33,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 97 transitions, 758 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:33,621 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 557 flow [2024-06-20 15:13:33,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=557, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-20 15:13:33,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-20 15:13:33,622 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 557 flow [2024-06-20 15:13:33,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:13:33,623 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:33,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007728, now seen corresponding path program 1 times [2024-06-20 15:13:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124960710] [2024-06-20 15:13:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124960710] [2024-06-20 15:13:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124960710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830756037] [2024-06-20 15:13:33,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:33,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 557 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,901 INFO L124 PetriNetUnfolderBase]: 1096/1818 cut-off events. [2024-06-20 15:13:33,902 INFO L125 PetriNetUnfolderBase]: For 8490/8493 co-relation queries the response was YES. [2024-06-20 15:13:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1818 events. 1096/1818 cut-off events. For 8490/8493 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9533 event pairs, 358 based on Foata normal form. 4/1813 useless extension candidates. Maximal degree in co-relation 7274. Up to 1531 conditions per place. [2024-06-20 15:13:33,913 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 59 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-20 15:13:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 831 flow [2024-06-20 15:13:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:13:33,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:13:33,915 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 557 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:13:33,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 831 flow [2024-06-20 15:13:33,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 756 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:33,926 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 568 flow [2024-06-20 15:13:33,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-20 15:13:33,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-20 15:13:33,929 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 568 flow [2024-06-20 15:13:33,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:13:33,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:33,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1572995888, now seen corresponding path program 2 times [2024-06-20 15:13:33,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485044432] [2024-06-20 15:13:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485044432] [2024-06-20 15:13:34,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485044432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:34,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967184359] [2024-06-20 15:13:34,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:34,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:34,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:34,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:34,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 568 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:34,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:34,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,208 INFO L124 PetriNetUnfolderBase]: 1091/1802 cut-off events. [2024-06-20 15:13:34,208 INFO L125 PetriNetUnfolderBase]: For 9379/9386 co-relation queries the response was YES. [2024-06-20 15:13:34,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7247 conditions, 1802 events. 1091/1802 cut-off events. For 9379/9386 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9350 event pairs, 350 based on Foata normal form. 8/1802 useless extension candidates. Maximal degree in co-relation 7216. Up to 1526 conditions per place. [2024-06-20 15:13:34,219 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-20 15:13:34,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 786 flow [2024-06-20 15:13:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:13:34,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-20 15:13:34,221 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 568 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:13:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 786 flow [2024-06-20 15:13:34,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 740 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:34,230 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 582 flow [2024-06-20 15:13:34,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-20 15:13:34,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 15:13:34,231 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 582 flow [2024-06-20 15:13:34,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:34,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:13:34,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:34,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387191, now seen corresponding path program 1 times [2024-06-20 15:13:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291965209] [2024-06-20 15:13:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291965209] [2024-06-20 15:13:34,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291965209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343344219] [2024-06-20 15:13:34,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:34,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:34,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:34,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,597 INFO L124 PetriNetUnfolderBase]: 1194/1960 cut-off events. [2024-06-20 15:13:34,597 INFO L125 PetriNetUnfolderBase]: For 11861/11861 co-relation queries the response was YES. [2024-06-20 15:13:34,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8103 conditions, 1960 events. 1194/1960 cut-off events. For 11861/11861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10256 event pairs, 259 based on Foata normal form. 4/1954 useless extension candidates. Maximal degree in co-relation 8072. Up to 1385 conditions per place. [2024-06-20 15:13:34,607 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2024-06-20 15:13:34,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-20 15:13:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:13:34,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-20 15:13:34,609 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 582 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:13:34,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-20 15:13:34,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 872 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:34,623 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 617 flow [2024-06-20 15:13:34,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-20 15:13:34,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-20 15:13:34,624 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 617 flow [2024-06-20 15:13:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:34,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:13:34,625 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:34,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1937222135, now seen corresponding path program 2 times [2024-06-20 15:13:34,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67251546] [2024-06-20 15:13:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67251546] [2024-06-20 15:13:34,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67251546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:34,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539456919] [2024-06-20 15:13:34,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:34,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 617 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:34,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:34,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,936 INFO L124 PetriNetUnfolderBase]: 1186/1953 cut-off events. [2024-06-20 15:13:34,937 INFO L125 PetriNetUnfolderBase]: For 13181/13181 co-relation queries the response was YES. [2024-06-20 15:13:34,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8304 conditions, 1953 events. 1186/1953 cut-off events. For 13181/13181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10294 event pairs, 343 based on Foata normal form. 4/1947 useless extension candidates. Maximal degree in co-relation 8273. Up to 1665 conditions per place. [2024-06-20 15:13:34,949 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 31 changer transitions 0/103 dead transitions. [2024-06-20 15:13:34,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 877 flow [2024-06-20 15:13:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:34,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:13:34,950 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 617 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:34,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 877 flow [2024-06-20 15:13:34,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 831 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:34,967 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 652 flow [2024-06-20 15:13:34,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=652, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-20 15:13:34,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-20 15:13:34,967 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 652 flow [2024-06-20 15:13:34,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:34,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:13:34,968 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1246913772, now seen corresponding path program 1 times [2024-06-20 15:13:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385356272] [2024-06-20 15:13:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385356272] [2024-06-20 15:13:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385356272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625176707] [2024-06-20 15:13:35,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:35,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:35,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:35,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 652 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:35,352 INFO L124 PetriNetUnfolderBase]: 1191/1979 cut-off events. [2024-06-20 15:13:35,353 INFO L125 PetriNetUnfolderBase]: For 14374/14374 co-relation queries the response was YES. [2024-06-20 15:13:35,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8605 conditions, 1979 events. 1191/1979 cut-off events. For 14374/14374 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10511 event pairs, 324 based on Foata normal form. 1/1979 useless extension candidates. Maximal degree in co-relation 8572. Up to 1813 conditions per place. [2024-06-20 15:13:35,366 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-20 15:13:35,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 974 flow [2024-06-20 15:13:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 15:13:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-20 15:13:35,367 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 652 flow. Second operand 5 states and 121 transitions. [2024-06-20 15:13:35,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 974 flow [2024-06-20 15:13:35,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 901 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:35,385 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 691 flow [2024-06-20 15:13:35,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=691, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-06-20 15:13:35,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 15:13:35,386 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 691 flow [2024-06-20 15:13:35,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:35,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:35,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:13:35,387 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:35,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash -813502781, now seen corresponding path program 1 times [2024-06-20 15:13:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:35,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525829513] [2024-06-20 15:13:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525829513] [2024-06-20 15:13:35,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525829513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:35,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999049530] [2024-06-20 15:13:35,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:35,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:35,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:35,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:35,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 691 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:35,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:35,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:35,721 INFO L124 PetriNetUnfolderBase]: 1183/1942 cut-off events. [2024-06-20 15:13:35,721 INFO L125 PetriNetUnfolderBase]: For 16315/16315 co-relation queries the response was YES. [2024-06-20 15:13:35,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 1942 events. 1183/1942 cut-off events. For 16315/16315 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10162 event pairs, 337 based on Foata normal form. 4/1939 useless extension candidates. Maximal degree in co-relation 8618. Up to 1660 conditions per place. [2024-06-20 15:13:35,733 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 31 changer transitions 0/111 dead transitions. [2024-06-20 15:13:35,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 973 flow [2024-06-20 15:13:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:13:35,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:13:35,735 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 691 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:13:35,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 973 flow [2024-06-20 15:13:35,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 953 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:35,799 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 768 flow [2024-06-20 15:13:35,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=768, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-06-20 15:13:35,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-20 15:13:35,801 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 768 flow [2024-06-20 15:13:35,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:35,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:35,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:35,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:13:35,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:35,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1134391939, now seen corresponding path program 2 times [2024-06-20 15:13:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:35,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262279098] [2024-06-20 15:13:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262279098] [2024-06-20 15:13:35,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262279098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:35,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493309754] [2024-06-20 15:13:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:35,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:35,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:35,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 768 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:35,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:35,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,142 INFO L124 PetriNetUnfolderBase]: 1236/2048 cut-off events. [2024-06-20 15:13:36,143 INFO L125 PetriNetUnfolderBase]: For 19721/19721 co-relation queries the response was YES. [2024-06-20 15:13:36,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9413 conditions, 2048 events. 1236/2048 cut-off events. For 19721/19721 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10939 event pairs, 307 based on Foata normal form. 4/2045 useless extension candidates. Maximal degree in co-relation 9375. Up to 1487 conditions per place. [2024-06-20 15:13:36,157 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-06-20 15:13:36,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1152 flow [2024-06-20 15:13:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:13:36,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 15:13:36,159 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 768 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:13:36,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1152 flow [2024-06-20 15:13:36,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 1075 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:36,184 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 806 flow [2024-06-20 15:13:36,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=806, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-20 15:13:36,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-20 15:13:36,185 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 806 flow [2024-06-20 15:13:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2024-06-20 15:13:36,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:13:36,186 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:36,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1246585482, now seen corresponding path program 2 times [2024-06-20 15:13:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745937720] [2024-06-20 15:13:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:36,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:36,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745937720] [2024-06-20 15:13:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745937720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:36,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:36,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:36,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198168749] [2024-06-20 15:13:36,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:36,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:36,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:36,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:36,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 806 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:36,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:36,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,525 INFO L124 PetriNetUnfolderBase]: 1238/2061 cut-off events. [2024-06-20 15:13:36,526 INFO L125 PetriNetUnfolderBase]: For 21687/21687 co-relation queries the response was YES. [2024-06-20 15:13:36,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9666 conditions, 2061 events. 1238/2061 cut-off events. For 21687/21687 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11052 event pairs, 341 based on Foata normal form. 2/2062 useless extension candidates. Maximal degree in co-relation 9627. Up to 1893 conditions per place. [2024-06-20 15:13:36,539 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 87 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-20 15:13:36,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1084 flow [2024-06-20 15:13:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-20 15:13:36,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:36,541 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 806 flow. Second operand 4 states and 104 transitions. [2024-06-20 15:13:36,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1084 flow [2024-06-20 15:13:36,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 1022 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:36,564 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 832 flow [2024-06-20 15:13:36,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=832, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-20 15:13:36,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-20 15:13:36,565 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 832 flow [2024-06-20 15:13:36,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:13:36,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:36,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash -632660391, now seen corresponding path program 1 times [2024-06-20 15:13:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772704357] [2024-06-20 15:13:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772704357] [2024-06-20 15:13:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772704357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565499971] [2024-06-20 15:13:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:36,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:36,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:36,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 832 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:36,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:36,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,921 INFO L124 PetriNetUnfolderBase]: 1279/2130 cut-off events. [2024-06-20 15:13:36,921 INFO L125 PetriNetUnfolderBase]: For 25618/25618 co-relation queries the response was YES. [2024-06-20 15:13:36,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10138 conditions, 2130 events. 1279/2130 cut-off events. For 25618/25618 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11644 event pairs, 286 based on Foata normal form. 12/2132 useless extension candidates. Maximal degree in co-relation 10097. Up to 1066 conditions per place. [2024-06-20 15:13:36,939 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 84 selfloop transitions, 32 changer transitions 0/123 dead transitions. [2024-06-20 15:13:36,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1174 flow [2024-06-20 15:13:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:13:36,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:13:36,940 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 832 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:13:36,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1174 flow [2024-06-20 15:13:36,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 123 transitions, 1134 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:36,965 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 874 flow [2024-06-20 15:13:36,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2024-06-20 15:13:36,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-20 15:13:36,966 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 874 flow [2024-06-20 15:13:36,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:13:36,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:36,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1721396175, now seen corresponding path program 2 times [2024-06-20 15:13:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685473741] [2024-06-20 15:13:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:37,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685473741] [2024-06-20 15:13:37,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685473741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:37,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:37,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598061877] [2024-06-20 15:13:37,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:37,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:37,312 INFO L124 PetriNetUnfolderBase]: 1259/2094 cut-off events. [2024-06-20 15:13:37,312 INFO L125 PetriNetUnfolderBase]: For 26149/26149 co-relation queries the response was YES. [2024-06-20 15:13:37,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 2094 events. 1259/2094 cut-off events. For 26149/26149 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11304 event pairs, 292 based on Foata normal form. 12/2099 useless extension candidates. Maximal degree in co-relation 10135. Up to 1555 conditions per place. [2024-06-20 15:13:37,327 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 82 selfloop transitions, 35 changer transitions 0/124 dead transitions. [2024-06-20 15:13:37,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 124 transitions, 1176 flow [2024-06-20 15:13:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:37,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:37,328 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 874 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:37,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 124 transitions, 1176 flow [2024-06-20 15:13:37,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 1123 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:37,354 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 897 flow [2024-06-20 15:13:37,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=897, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2024-06-20 15:13:37,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-20 15:13:37,355 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 897 flow [2024-06-20 15:13:37,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:37,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:37,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:13:37,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:37,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:37,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1176641722, now seen corresponding path program 1 times [2024-06-20 15:13:37,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:37,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125945132] [2024-06-20 15:13:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:37,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:37,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125945132] [2024-06-20 15:13:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125945132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:37,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:37,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:37,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336850038] [2024-06-20 15:13:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:37,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:37,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:37,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 897 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:37,727 INFO L124 PetriNetUnfolderBase]: 1298/2171 cut-off events. [2024-06-20 15:13:37,728 INFO L125 PetriNetUnfolderBase]: For 28287/28287 co-relation queries the response was YES. [2024-06-20 15:13:37,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 2171 events. 1298/2171 cut-off events. For 28287/28287 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11933 event pairs, 357 based on Foata normal form. 3/2164 useless extension candidates. Maximal degree in co-relation 10550. Up to 1766 conditions per place. [2024-06-20 15:13:37,742 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 90 selfloop transitions, 48 changer transitions 0/145 dead transitions. [2024-06-20 15:13:37,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 145 transitions, 1519 flow [2024-06-20 15:13:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:13:37,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-20 15:13:37,744 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 897 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:13:37,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 145 transitions, 1519 flow [2024-06-20 15:13:37,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 145 transitions, 1436 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:37,771 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 1128 flow [2024-06-20 15:13:37,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1128, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2024-06-20 15:13:37,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-20 15:13:37,771 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 1128 flow [2024-06-20 15:13:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:37,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:13:37,772 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:37,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 413521959, now seen corresponding path program 3 times [2024-06-20 15:13:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:37,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648417714] [2024-06-20 15:13:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:37,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:37,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:37,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648417714] [2024-06-20 15:13:37,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648417714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:37,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:37,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:37,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253977086] [2024-06-20 15:13:37,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:37,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:37,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 1128 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:37,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:38,182 INFO L124 PetriNetUnfolderBase]: 1400/2369 cut-off events. [2024-06-20 15:13:38,182 INFO L125 PetriNetUnfolderBase]: For 36322/36333 co-relation queries the response was YES. [2024-06-20 15:13:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12151 conditions, 2369 events. 1400/2369 cut-off events. For 36322/36333 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13422 event pairs, 318 based on Foata normal form. 22/2383 useless extension candidates. Maximal degree in co-relation 12105. Up to 1692 conditions per place. [2024-06-20 15:13:38,201 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-20 15:13:38,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 151 transitions, 1602 flow [2024-06-20 15:13:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:13:38,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:38,203 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 1128 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:13:38,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 151 transitions, 1602 flow [2024-06-20 15:13:38,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1564 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:38,239 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1184 flow [2024-06-20 15:13:38,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1184, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-20 15:13:38,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-20 15:13:38,240 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1184 flow [2024-06-20 15:13:38,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:38,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:38,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:13:38,240 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:38,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash -179426513, now seen corresponding path program 4 times [2024-06-20 15:13:38,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:38,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093895561] [2024-06-20 15:13:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:38,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093895561] [2024-06-20 15:13:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093895561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736672619] [2024-06-20 15:13:38,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:38,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:38,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:38,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1184 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:38,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:38,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:38,669 INFO L124 PetriNetUnfolderBase]: 1458/2467 cut-off events. [2024-06-20 15:13:38,669 INFO L125 PetriNetUnfolderBase]: For 41061/41072 co-relation queries the response was YES. [2024-06-20 15:13:38,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12788 conditions, 2467 events. 1458/2467 cut-off events. For 41061/41072 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14168 event pairs, 423 based on Foata normal form. 26/2485 useless extension candidates. Maximal degree in co-relation 12739. Up to 2045 conditions per place. [2024-06-20 15:13:38,704 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 113 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-20 15:13:38,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1551 flow [2024-06-20 15:13:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:38,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:13:38,706 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1184 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:38,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1551 flow [2024-06-20 15:13:38,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1509 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:38,744 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 1220 flow [2024-06-20 15:13:38,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1220, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2024-06-20 15:13:38,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-20 15:13:38,745 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 1220 flow [2024-06-20 15:13:38,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:38,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:38,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:13:38,745 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:38,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -174064133, now seen corresponding path program 5 times [2024-06-20 15:13:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:38,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991655660] [2024-06-20 15:13:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:38,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:38,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991655660] [2024-06-20 15:13:38,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991655660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:38,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:38,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:38,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902201859] [2024-06-20 15:13:38,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:38,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:38,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:38,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:38,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:38,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:38,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 1220 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:38,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:38,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:39,120 INFO L124 PetriNetUnfolderBase]: 1430/2422 cut-off events. [2024-06-20 15:13:39,121 INFO L125 PetriNetUnfolderBase]: For 40573/40576 co-relation queries the response was YES. [2024-06-20 15:13:39,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2422 events. 1430/2422 cut-off events. For 40573/40576 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13841 event pairs, 410 based on Foata normal form. 18/2431 useless extension candidates. Maximal degree in co-relation 12472. Up to 2001 conditions per place. [2024-06-20 15:13:39,139 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-20 15:13:39,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1558 flow [2024-06-20 15:13:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:13:39,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:13:39,142 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 1220 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:13:39,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1558 flow [2024-06-20 15:13:39,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 144 transitions, 1499 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:39,185 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1222 flow [2024-06-20 15:13:39,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1222, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-20 15:13:39,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-20 15:13:39,185 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1222 flow [2024-06-20 15:13:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:39,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:39,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:13:39,186 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:39,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash -173848931, now seen corresponding path program 1 times [2024-06-20 15:13:39,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934707386] [2024-06-20 15:13:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:39,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934707386] [2024-06-20 15:13:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934707386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:39,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:39,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:39,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212492192] [2024-06-20 15:13:39,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:39,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:39,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:39,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:39,604 INFO L124 PetriNetUnfolderBase]: 1471/2503 cut-off events. [2024-06-20 15:13:39,604 INFO L125 PetriNetUnfolderBase]: For 42662/42665 co-relation queries the response was YES. [2024-06-20 15:13:39,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12861 conditions, 2503 events. 1471/2503 cut-off events. For 42662/42665 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14512 event pairs, 348 based on Foata normal form. 14/2508 useless extension candidates. Maximal degree in co-relation 12809. Up to 1783 conditions per place. [2024-06-20 15:13:39,622 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-20 15:13:39,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 1593 flow [2024-06-20 15:13:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:39,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:13:39,625 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1222 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:39,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 1593 flow [2024-06-20 15:13:39,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 148 transitions, 1525 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:39,664 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1239 flow [2024-06-20 15:13:39,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1239, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-20 15:13:39,666 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-20 15:13:39,666 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1239 flow [2024-06-20 15:13:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:39,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:39,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:13:39,667 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:39,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:39,667 INFO L85 PathProgramCache]: Analyzing trace with hash 979984476, now seen corresponding path program 2 times [2024-06-20 15:13:39,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:39,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001015283] [2024-06-20 15:13:39,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:39,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001015283] [2024-06-20 15:13:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001015283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858426601] [2024-06-20 15:13:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:39,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:39,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1239 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:39,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:39,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:40,037 INFO L124 PetriNetUnfolderBase]: 1514/2558 cut-off events. [2024-06-20 15:13:40,037 INFO L125 PetriNetUnfolderBase]: For 43664/43664 co-relation queries the response was YES. [2024-06-20 15:13:40,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 2558 events. 1514/2558 cut-off events. For 43664/43664 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14820 event pairs, 408 based on Foata normal form. 3/2551 useless extension candidates. Maximal degree in co-relation 13338. Up to 2099 conditions per place. [2024-06-20 15:13:40,055 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 93 selfloop transitions, 53 changer transitions 0/153 dead transitions. [2024-06-20 15:13:40,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 153 transitions, 1849 flow [2024-06-20 15:13:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:40,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:40,057 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1239 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 153 transitions, 1849 flow [2024-06-20 15:13:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 153 transitions, 1779 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:40,116 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 1406 flow [2024-06-20 15:13:40,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2024-06-20 15:13:40,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-20 15:13:40,117 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 1406 flow [2024-06-20 15:13:40,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:40,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:40,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:13:40,118 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:40,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 379698, now seen corresponding path program 1 times [2024-06-20 15:13:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:40,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188477280] [2024-06-20 15:13:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:40,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188477280] [2024-06-20 15:13:40,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188477280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:40,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:40,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:40,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347170711] [2024-06-20 15:13:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:40,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:40,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:40,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 1406 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:40,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:40,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:40,520 INFO L124 PetriNetUnfolderBase]: 1519/2576 cut-off events. [2024-06-20 15:13:40,521 INFO L125 PetriNetUnfolderBase]: For 45748/45748 co-relation queries the response was YES. [2024-06-20 15:13:40,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13655 conditions, 2576 events. 1519/2576 cut-off events. For 45748/45748 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14918 event pairs, 386 based on Foata normal form. 1/2576 useless extension candidates. Maximal degree in co-relation 13600. Up to 2342 conditions per place. [2024-06-20 15:13:40,541 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 123 selfloop transitions, 25 changer transitions 0/155 dead transitions. [2024-06-20 15:13:40,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 1882 flow [2024-06-20 15:13:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:13:40,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:13:40,543 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 1406 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:13:40,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 1882 flow [2024-06-20 15:13:40,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 155 transitions, 1793 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:40,603 INFO L231 Difference]: Finished difference. Result has 120 places, 138 transitions, 1467 flow [2024-06-20 15:13:40,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1467, PETRI_PLACES=120, PETRI_TRANSITIONS=138} [2024-06-20 15:13:40,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-20 15:13:40,604 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 138 transitions, 1467 flow [2024-06-20 15:13:40,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:40,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:40,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:13:40,605 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:40,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:40,605 INFO L85 PathProgramCache]: Analyzing trace with hash 807718459, now seen corresponding path program 2 times [2024-06-20 15:13:40,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:40,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436348652] [2024-06-20 15:13:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:40,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436348652] [2024-06-20 15:13:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436348652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:40,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:40,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:40,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915272327] [2024-06-20 15:13:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:40,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:40,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 138 transitions, 1467 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:40,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:40,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:40,999 INFO L124 PetriNetUnfolderBase]: 1499/2535 cut-off events. [2024-06-20 15:13:41,000 INFO L125 PetriNetUnfolderBase]: For 48842/48842 co-relation queries the response was YES. [2024-06-20 15:13:41,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13324 conditions, 2535 events. 1499/2535 cut-off events. For 48842/48842 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14578 event pairs, 274 based on Foata normal form. 12/2537 useless extension candidates. Maximal degree in co-relation 13268. Up to 1931 conditions per place. [2024-06-20 15:13:41,019 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 125 selfloop transitions, 35 changer transitions 0/167 dead transitions. [2024-06-20 15:13:41,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1869 flow [2024-06-20 15:13:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:13:41,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:41,021 INFO L175 Difference]: Start difference. First operand has 120 places, 138 transitions, 1467 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:13:41,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1869 flow [2024-06-20 15:13:41,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 167 transitions, 1817 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:41,082 INFO L231 Difference]: Finished difference. Result has 124 places, 138 transitions, 1491 flow [2024-06-20 15:13:41,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=124, PETRI_TRANSITIONS=138} [2024-06-20 15:13:41,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-20 15:13:41,083 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 138 transitions, 1491 flow [2024-06-20 15:13:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:41,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:13:41,083 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:41,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash -377706113, now seen corresponding path program 3 times [2024-06-20 15:13:41,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:41,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693548233] [2024-06-20 15:13:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:41,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:41,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693548233] [2024-06-20 15:13:41,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693548233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:41,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837633437] [2024-06-20 15:13:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:41,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:41,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 138 transitions, 1491 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:41,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:41,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:41,509 INFO L124 PetriNetUnfolderBase]: 1479/2514 cut-off events. [2024-06-20 15:13:41,509 INFO L125 PetriNetUnfolderBase]: For 49649/49649 co-relation queries the response was YES. [2024-06-20 15:13:41,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13231 conditions, 2514 events. 1479/2514 cut-off events. For 49649/49649 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14564 event pairs, 254 based on Foata normal form. 12/2516 useless extension candidates. Maximal degree in co-relation 13173. Up to 1219 conditions per place. [2024-06-20 15:13:41,530 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-20 15:13:41,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 161 transitions, 1821 flow [2024-06-20 15:13:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:13:41,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:13:41,532 INFO L175 Difference]: Start difference. First operand has 124 places, 138 transitions, 1491 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:13:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 161 transitions, 1821 flow [2024-06-20 15:13:41,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1720 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:41,595 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 1420 flow [2024-06-20 15:13:41,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1420, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2024-06-20 15:13:41,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-20 15:13:41,596 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 1420 flow [2024-06-20 15:13:41,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:41,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:41,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:13:41,597 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:41,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash -909435510, now seen corresponding path program 2 times [2024-06-20 15:13:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858954304] [2024-06-20 15:13:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:41,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:41,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858954304] [2024-06-20 15:13:41,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858954304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:41,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:41,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49221589] [2024-06-20 15:13:41,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:41,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:41,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:41,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 1420 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:41,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:41,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:42,022 INFO L124 PetriNetUnfolderBase]: 1476/2508 cut-off events. [2024-06-20 15:13:42,023 INFO L125 PetriNetUnfolderBase]: For 44157/44157 co-relation queries the response was YES. [2024-06-20 15:13:42,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13073 conditions, 2508 events. 1476/2508 cut-off events. For 44157/44157 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14540 event pairs, 358 based on Foata normal form. 1/2508 useless extension candidates. Maximal degree in co-relation 13014. Up to 2281 conditions per place. [2024-06-20 15:13:42,043 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2024-06-20 15:13:42,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 152 transitions, 1748 flow [2024-06-20 15:13:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 15:13:42,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-20 15:13:42,045 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 1420 flow. Second operand 5 states and 121 transitions. [2024-06-20 15:13:42,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 152 transitions, 1748 flow [2024-06-20 15:13:42,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1578 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:42,105 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1296 flow [2024-06-20 15:13:42,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1296, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2024-06-20 15:13:42,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 15:13:42,106 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1296 flow [2024-06-20 15:13:42,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:13:42,107 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:42,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1347882524, now seen corresponding path program 3 times [2024-06-20 15:13:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615480059] [2024-06-20 15:13:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615480059] [2024-06-20 15:13:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615480059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513692976] [2024-06-20 15:13:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:42,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:42,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1296 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:42,529 INFO L124 PetriNetUnfolderBase]: 1578/2676 cut-off events. [2024-06-20 15:13:42,529 INFO L125 PetriNetUnfolderBase]: For 50495/50498 co-relation queries the response was YES. [2024-06-20 15:13:42,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13519 conditions, 2676 events. 1578/2676 cut-off events. For 50495/50498 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15696 event pairs, 362 based on Foata normal form. 8/2682 useless extension candidates. Maximal degree in co-relation 13461. Up to 2191 conditions per place. [2024-06-20 15:13:42,589 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-20 15:13:42,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 2101 flow [2024-06-20 15:13:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-20 15:13:42,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-20 15:13:42,590 INFO L175 Difference]: Start difference. First operand has 122 places, 137 transitions, 1296 flow. Second operand 6 states and 162 transitions. [2024-06-20 15:13:42,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 2101 flow [2024-06-20 15:13:42,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 190 transitions, 2035 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:42,655 INFO L231 Difference]: Finished difference. Result has 126 places, 161 transitions, 1719 flow [2024-06-20 15:13:42,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=126, PETRI_TRANSITIONS=161} [2024-06-20 15:13:42,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 15:13:42,656 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 161 transitions, 1719 flow [2024-06-20 15:13:42,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:42,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:13:42,656 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:42,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1179730858, now seen corresponding path program 1 times [2024-06-20 15:13:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849898284] [2024-06-20 15:13:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849898284] [2024-06-20 15:13:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849898284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:42,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956263693] [2024-06-20 15:13:42,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:42,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:42,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:42,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 161 transitions, 1719 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:42,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,043 INFO L124 PetriNetUnfolderBase]: 1601/2701 cut-off events. [2024-06-20 15:13:43,043 INFO L125 PetriNetUnfolderBase]: For 56967/56967 co-relation queries the response was YES. [2024-06-20 15:13:43,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14960 conditions, 2701 events. 1601/2701 cut-off events. For 56967/56967 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15830 event pairs, 395 based on Foata normal form. 3/2697 useless extension candidates. Maximal degree in co-relation 14899. Up to 2191 conditions per place. [2024-06-20 15:13:43,065 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 77 changer transitions 0/193 dead transitions. [2024-06-20 15:13:43,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 193 transitions, 2457 flow [2024-06-20 15:13:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:13:43,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:13:43,067 INFO L175 Difference]: Start difference. First operand has 126 places, 161 transitions, 1719 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:13:43,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 193 transitions, 2457 flow [2024-06-20 15:13:43,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 193 transitions, 2407 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:43,147 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 2015 flow [2024-06-20 15:13:43,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2015, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2024-06-20 15:13:43,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-20 15:13:43,148 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 2015 flow [2024-06-20 15:13:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:13:43,149 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:43,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1147698722, now seen corresponding path program 2 times [2024-06-20 15:13:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852647421] [2024-06-20 15:13:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852647421] [2024-06-20 15:13:43,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852647421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377921366] [2024-06-20 15:13:43,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:43,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:43,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 2015 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:43,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,600 INFO L124 PetriNetUnfolderBase]: 1667/2816 cut-off events. [2024-06-20 15:13:43,600 INFO L125 PetriNetUnfolderBase]: For 63471/63471 co-relation queries the response was YES. [2024-06-20 15:13:43,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16449 conditions, 2816 events. 1667/2816 cut-off events. For 63471/63471 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16618 event pairs, 359 based on Foata normal form. 4/2819 useless extension candidates. Maximal degree in co-relation 16385. Up to 2518 conditions per place. [2024-06-20 15:13:43,625 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 167 selfloop transitions, 37 changer transitions 0/211 dead transitions. [2024-06-20 15:13:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 211 transitions, 2850 flow [2024-06-20 15:13:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:13:43,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:13:43,626 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 2015 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:13:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 211 transitions, 2850 flow [2024-06-20 15:13:43,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 211 transitions, 2754 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:43,728 INFO L231 Difference]: Finished difference. Result has 140 places, 195 transitions, 2374 flow [2024-06-20 15:13:43,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2374, PETRI_PLACES=140, PETRI_TRANSITIONS=195} [2024-06-20 15:13:43,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-20 15:13:43,729 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 195 transitions, 2374 flow [2024-06-20 15:13:43,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:13:43,729 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:43,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1348067222, now seen corresponding path program 3 times [2024-06-20 15:13:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757971648] [2024-06-20 15:13:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757971648] [2024-06-20 15:13:43,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757971648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:43,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414179423] [2024-06-20 15:13:43,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:43,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:43,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:43,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:43,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 195 transitions, 2374 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:43,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,233 INFO L124 PetriNetUnfolderBase]: 1665/2822 cut-off events. [2024-06-20 15:13:44,233 INFO L125 PetriNetUnfolderBase]: For 66488/66488 co-relation queries the response was YES. [2024-06-20 15:13:44,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16572 conditions, 2822 events. 1665/2822 cut-off events. For 66488/66488 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16672 event pairs, 354 based on Foata normal form. 6/2827 useless extension candidates. Maximal degree in co-relation 16504. Up to 2266 conditions per place. [2024-06-20 15:13:44,257 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 122 selfloop transitions, 99 changer transitions 0/228 dead transitions. [2024-06-20 15:13:44,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 228 transitions, 3087 flow [2024-06-20 15:13:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:13:44,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-20 15:13:44,259 INFO L175 Difference]: Start difference. First operand has 140 places, 195 transitions, 2374 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:13:44,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 228 transitions, 3087 flow [2024-06-20 15:13:44,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 228 transitions, 2957 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:44,365 INFO L231 Difference]: Finished difference. Result has 144 places, 200 transitions, 2559 flow [2024-06-20 15:13:44,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2559, PETRI_PLACES=144, PETRI_TRANSITIONS=200} [2024-06-20 15:13:44,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 15:13:44,366 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 200 transitions, 2559 flow [2024-06-20 15:13:44,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:13:44,367 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:44,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1348313486, now seen corresponding path program 1 times [2024-06-20 15:13:44,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577546685] [2024-06-20 15:13:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:44,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:44,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577546685] [2024-06-20 15:13:44,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577546685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:44,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:44,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432165269] [2024-06-20 15:13:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:44,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:44,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 200 transitions, 2559 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:44,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:44,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,781 INFO L124 PetriNetUnfolderBase]: 1660/2798 cut-off events. [2024-06-20 15:13:44,781 INFO L125 PetriNetUnfolderBase]: For 68146/68146 co-relation queries the response was YES. [2024-06-20 15:13:44,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16921 conditions, 2798 events. 1660/2798 cut-off events. For 68146/68146 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16438 event pairs, 355 based on Foata normal form. 2/2799 useless extension candidates. Maximal degree in co-relation 16852. Up to 2557 conditions per place. [2024-06-20 15:13:44,804 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 194 selfloop transitions, 10 changer transitions 0/211 dead transitions. [2024-06-20 15:13:44,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 211 transitions, 3019 flow [2024-06-20 15:13:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-20 15:13:44,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:13:44,806 INFO L175 Difference]: Start difference. First operand has 144 places, 200 transitions, 2559 flow. Second operand 4 states and 95 transitions. [2024-06-20 15:13:44,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 211 transitions, 3019 flow [2024-06-20 15:13:44,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2841 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:44,921 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2440 flow [2024-06-20 15:13:44,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2440, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-20 15:13:44,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 15:13:44,922 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2440 flow [2024-06-20 15:13:44,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:13:44,922 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:44,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1547518576, now seen corresponding path program 1 times [2024-06-20 15:13:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937977044] [2024-06-20 15:13:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937977044] [2024-06-20 15:13:45,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937977044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349095328] [2024-06-20 15:13:45,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:45,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:45,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:45,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2440 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:45,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:45,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,379 INFO L124 PetriNetUnfolderBase]: 1699/2858 cut-off events. [2024-06-20 15:13:45,379 INFO L125 PetriNetUnfolderBase]: For 74731/74731 co-relation queries the response was YES. [2024-06-20 15:13:45,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17154 conditions, 2858 events. 1699/2858 cut-off events. For 74731/74731 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16899 event pairs, 389 based on Foata normal form. 3/2851 useless extension candidates. Maximal degree in co-relation 17084. Up to 2080 conditions per place. [2024-06-20 15:13:45,401 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 117 selfloop transitions, 124 changer transitions 0/248 dead transitions. [2024-06-20 15:13:45,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 248 transitions, 3454 flow [2024-06-20 15:13:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:13:45,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-20 15:13:45,403 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2440 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:13:45,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 248 transitions, 3454 flow [2024-06-20 15:13:45,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 248 transitions, 3407 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:45,541 INFO L231 Difference]: Finished difference. Result has 151 places, 221 transitions, 3031 flow [2024-06-20 15:13:45,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3031, PETRI_PLACES=151, PETRI_TRANSITIONS=221} [2024-06-20 15:13:45,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-20 15:13:45,542 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 221 transitions, 3031 flow [2024-06-20 15:13:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:45,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:45,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:13:45,542 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:45,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash 6049779, now seen corresponding path program 1 times [2024-06-20 15:13:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:45,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80702567] [2024-06-20 15:13:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80702567] [2024-06-20 15:13:45,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80702567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:45,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158584695] [2024-06-20 15:13:45,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:45,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:45,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:45,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:45,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 221 transitions, 3031 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:45,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:45,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,085 INFO L124 PetriNetUnfolderBase]: 1725/2889 cut-off events. [2024-06-20 15:13:46,086 INFO L125 PetriNetUnfolderBase]: For 83486/83486 co-relation queries the response was YES. [2024-06-20 15:13:46,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18991 conditions, 2889 events. 1725/2889 cut-off events. For 83486/83486 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17003 event pairs, 386 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18918. Up to 2320 conditions per place. [2024-06-20 15:13:46,112 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 91 changer transitions 0/253 dead transitions. [2024-06-20 15:13:46,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 253 transitions, 3982 flow [2024-06-20 15:13:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:46,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:46,114 INFO L175 Difference]: Start difference. First operand has 151 places, 221 transitions, 3031 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:46,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 253 transitions, 3982 flow [2024-06-20 15:13:46,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 253 transitions, 3898 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:46,275 INFO L231 Difference]: Finished difference. Result has 157 places, 231 transitions, 3360 flow [2024-06-20 15:13:46,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3360, PETRI_PLACES=157, PETRI_TRANSITIONS=231} [2024-06-20 15:13:46,276 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-20 15:13:46,276 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 231 transitions, 3360 flow [2024-06-20 15:13:46,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:13:46,277 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:46,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash 11763699, now seen corresponding path program 2 times [2024-06-20 15:13:46,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31186818] [2024-06-20 15:13:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31186818] [2024-06-20 15:13:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31186818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:46,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64075294] [2024-06-20 15:13:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:46,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:46,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:46,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 231 transitions, 3360 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:46,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,754 INFO L124 PetriNetUnfolderBase]: 1719/2883 cut-off events. [2024-06-20 15:13:46,754 INFO L125 PetriNetUnfolderBase]: For 85285/85285 co-relation queries the response was YES. [2024-06-20 15:13:46,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18855 conditions, 2883 events. 1719/2883 cut-off events. For 85285/85285 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17036 event pairs, 386 based on Foata normal form. 2/2875 useless extension candidates. Maximal degree in co-relation 18778. Up to 2317 conditions per place. [2024-06-20 15:13:46,776 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 156 selfloop transitions, 87 changer transitions 0/250 dead transitions. [2024-06-20 15:13:46,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 4102 flow [2024-06-20 15:13:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:46,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:13:46,778 INFO L175 Difference]: Start difference. First operand has 157 places, 231 transitions, 3360 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:46,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 4102 flow [2024-06-20 15:13:46,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 250 transitions, 3975 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:46,927 INFO L231 Difference]: Finished difference. Result has 161 places, 231 transitions, 3416 flow [2024-06-20 15:13:46,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3416, PETRI_PLACES=161, PETRI_TRANSITIONS=231} [2024-06-20 15:13:46,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-20 15:13:46,928 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 231 transitions, 3416 flow [2024-06-20 15:13:46,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:13:46,929 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:46,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1556773006, now seen corresponding path program 2 times [2024-06-20 15:13:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984303244] [2024-06-20 15:13:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984303244] [2024-06-20 15:13:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984303244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803979809] [2024-06-20 15:13:47,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:47,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:47,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 231 transitions, 3416 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:47,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,405 INFO L124 PetriNetUnfolderBase]: 1786/2993 cut-off events. [2024-06-20 15:13:47,406 INFO L125 PetriNetUnfolderBase]: For 95134/95134 co-relation queries the response was YES. [2024-06-20 15:13:47,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 2993 events. 1786/2993 cut-off events. For 95134/95134 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17799 event pairs, 393 based on Foata normal form. 3/2986 useless extension candidates. Maximal degree in co-relation 19831. Up to 2136 conditions per place. [2024-06-20 15:13:47,433 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 130 changer transitions 0/268 dead transitions. [2024-06-20 15:13:47,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 268 transitions, 4526 flow [2024-06-20 15:13:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:13:47,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:13:47,435 INFO L175 Difference]: Start difference. First operand has 161 places, 231 transitions, 3416 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:13:47,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 268 transitions, 4526 flow [2024-06-20 15:13:47,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 268 transitions, 4366 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:47,607 INFO L231 Difference]: Finished difference. Result has 166 places, 246 transitions, 3783 flow [2024-06-20 15:13:47,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3783, PETRI_PLACES=166, PETRI_TRANSITIONS=246} [2024-06-20 15:13:47,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 15:13:47,608 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 246 transitions, 3783 flow [2024-06-20 15:13:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:13:47,609 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:47,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash 11771232, now seen corresponding path program 3 times [2024-06-20 15:13:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059284883] [2024-06-20 15:13:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059284883] [2024-06-20 15:13:47,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059284883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174110846] [2024-06-20 15:13:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:47,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:47,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 246 transitions, 3783 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:47,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:48,130 INFO L124 PetriNetUnfolderBase]: 1781/2990 cut-off events. [2024-06-20 15:13:48,141 INFO L125 PetriNetUnfolderBase]: For 98204/98204 co-relation queries the response was YES. [2024-06-20 15:13:48,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20201 conditions, 2990 events. 1781/2990 cut-off events. For 98204/98204 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17792 event pairs, 393 based on Foata normal form. 3/2983 useless extension candidates. Maximal degree in co-relation 20121. Up to 2134 conditions per place. [2024-06-20 15:13:48,164 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 129 changer transitions 0/268 dead transitions. [2024-06-20 15:13:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 268 transitions, 4677 flow [2024-06-20 15:13:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:48,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:13:48,167 INFO L175 Difference]: Start difference. First operand has 166 places, 246 transitions, 3783 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:48,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 268 transitions, 4677 flow [2024-06-20 15:13:48,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 268 transitions, 4425 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:48,352 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3798 flow [2024-06-20 15:13:48,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3798, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-20 15:13:48,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 15:13:48,353 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3798 flow [2024-06-20 15:13:48,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:48,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:48,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:13:48,353 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:48,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1218339395, now seen corresponding path program 3 times [2024-06-20 15:13:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:48,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958543305] [2024-06-20 15:13:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958543305] [2024-06-20 15:13:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958543305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604526947] [2024-06-20 15:13:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:48,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:48,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3798 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:48,815 INFO L124 PetriNetUnfolderBase]: 1767/2963 cut-off events. [2024-06-20 15:13:48,815 INFO L125 PetriNetUnfolderBase]: For 102400/102400 co-relation queries the response was YES. [2024-06-20 15:13:48,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19973 conditions, 2963 events. 1767/2963 cut-off events. For 102400/102400 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17593 event pairs, 393 based on Foata normal form. 2/2958 useless extension candidates. Maximal degree in co-relation 19892. Up to 2390 conditions per place. [2024-06-20 15:13:48,841 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 165 selfloop transitions, 93 changer transitions 0/265 dead transitions. [2024-06-20 15:13:48,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 265 transitions, 4588 flow [2024-06-20 15:13:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:48,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:48,843 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3798 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:48,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 265 transitions, 4588 flow [2024-06-20 15:13:49,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 265 transitions, 4307 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:49,024 INFO L231 Difference]: Finished difference. Result has 172 places, 246 transitions, 3710 flow [2024-06-20 15:13:49,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3710, PETRI_PLACES=172, PETRI_TRANSITIONS=246} [2024-06-20 15:13:49,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 15:13:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 246 transitions, 3710 flow [2024-06-20 15:13:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:49,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:49,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:13:49,026 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:49,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1202487893, now seen corresponding path program 4 times [2024-06-20 15:13:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:49,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432128066] [2024-06-20 15:13:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:49,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432128066] [2024-06-20 15:13:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432128066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081271954] [2024-06-20 15:13:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:49,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:49,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:49,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 246 transitions, 3710 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:49,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,562 INFO L124 PetriNetUnfolderBase]: 1751/2949 cut-off events. [2024-06-20 15:13:49,563 INFO L125 PetriNetUnfolderBase]: For 100621/100621 co-relation queries the response was YES. [2024-06-20 15:13:49,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19508 conditions, 2949 events. 1751/2949 cut-off events. For 100621/100621 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17512 event pairs, 351 based on Foata normal form. 4/2952 useless extension candidates. Maximal degree in co-relation 19426. Up to 2643 conditions per place. [2024-06-20 15:13:49,592 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 217 selfloop transitions, 37 changer transitions 0/261 dead transitions. [2024-06-20 15:13:49,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 261 transitions, 4262 flow [2024-06-20 15:13:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 15:13:49,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-20 15:13:49,594 INFO L175 Difference]: Start difference. First operand has 172 places, 246 transitions, 3710 flow. Second operand 7 states and 159 transitions. [2024-06-20 15:13:49,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 261 transitions, 4262 flow [2024-06-20 15:13:49,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 3916 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:13:49,780 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3453 flow [2024-06-20 15:13:49,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3453, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-20 15:13:49,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 15:13:49,781 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3453 flow [2024-06-20 15:13:49,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:49,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:49,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:13:49,782 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:49,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash -746037595, now seen corresponding path program 5 times [2024-06-20 15:13:49,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:49,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451298358] [2024-06-20 15:13:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451298358] [2024-06-20 15:13:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451298358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:49,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518135170] [2024-06-20 15:13:49,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:49,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:49,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3453 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:49,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:50,344 INFO L124 PetriNetUnfolderBase]: 1743/2939 cut-off events. [2024-06-20 15:13:50,345 INFO L125 PetriNetUnfolderBase]: For 100877/100877 co-relation queries the response was YES. [2024-06-20 15:13:50,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18915 conditions, 2939 events. 1743/2939 cut-off events. For 100877/100877 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17495 event pairs, 350 based on Foata normal form. 4/2942 useless extension candidates. Maximal degree in co-relation 18834. Up to 2381 conditions per place. [2024-06-20 15:13:50,375 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 102 changer transitions 0/277 dead transitions. [2024-06-20 15:13:50,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 277 transitions, 4293 flow [2024-06-20 15:13:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:13:50,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-20 15:13:50,376 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3453 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:13:50,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 277 transitions, 4293 flow [2024-06-20 15:13:50,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 277 transitions, 4231 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:50,592 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 3699 flow [2024-06-20 15:13:50,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3699, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-20 15:13:50,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-20 15:13:50,593 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 3699 flow [2024-06-20 15:13:50,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:13:50,593 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:50,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1429463815, now seen corresponding path program 6 times [2024-06-20 15:13:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892088258] [2024-06-20 15:13:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892088258] [2024-06-20 15:13:50,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892088258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:50,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879008444] [2024-06-20 15:13:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:50,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:50,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 3699 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:50,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,081 INFO L124 PetriNetUnfolderBase]: 1719/2897 cut-off events. [2024-06-20 15:13:51,081 INFO L125 PetriNetUnfolderBase]: For 102814/102817 co-relation queries the response was YES. [2024-06-20 15:13:51,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 2897 events. 1719/2897 cut-off events. For 102814/102817 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17171 event pairs, 358 based on Foata normal form. 6/2901 useless extension candidates. Maximal degree in co-relation 18811. Up to 2361 conditions per place. [2024-06-20 15:13:51,108 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 170 selfloop transitions, 95 changer transitions 0/272 dead transitions. [2024-06-20 15:13:51,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 272 transitions, 4369 flow [2024-06-20 15:13:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:13:51,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-20 15:13:51,110 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 3699 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:13:51,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 272 transitions, 4369 flow [2024-06-20 15:13:51,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 272 transitions, 4141 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:51,368 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 3685 flow [2024-06-20 15:13:51,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3685, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-20 15:13:51,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-20 15:13:51,369 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 3685 flow [2024-06-20 15:13:51,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:51,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:13:51,370 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:51,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1429467442, now seen corresponding path program 4 times [2024-06-20 15:13:51,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208205150] [2024-06-20 15:13:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:51,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208205150] [2024-06-20 15:13:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208205150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:51,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:51,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847797833] [2024-06-20 15:13:51,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:51,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:51,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:51,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 3685 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:51,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:51,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,886 INFO L124 PetriNetUnfolderBase]: 1774/2986 cut-off events. [2024-06-20 15:13:51,886 INFO L125 PetriNetUnfolderBase]: For 101625/101628 co-relation queries the response was YES. [2024-06-20 15:13:51,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19490 conditions, 2986 events. 1774/2986 cut-off events. For 101625/101628 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17764 event pairs, 358 based on Foata normal form. 5/2989 useless extension candidates. Maximal degree in co-relation 19409. Up to 2350 conditions per place. [2024-06-20 15:13:51,913 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 173 selfloop transitions, 114 changer transitions 0/294 dead transitions. [2024-06-20 15:13:51,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 294 transitions, 4823 flow [2024-06-20 15:13:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:13:51,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-20 15:13:51,914 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 3685 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:13:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 294 transitions, 4823 flow [2024-06-20 15:13:52,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 294 transitions, 4533 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:52,096 INFO L231 Difference]: Finished difference. Result has 175 places, 264 transitions, 3993 flow [2024-06-20 15:13:52,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3993, PETRI_PLACES=175, PETRI_TRANSITIONS=264} [2024-06-20 15:13:52,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-20 15:13:52,097 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 264 transitions, 3993 flow [2024-06-20 15:13:52,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:13:52,097 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:52,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1165302590, now seen corresponding path program 5 times [2024-06-20 15:13:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203221672] [2024-06-20 15:13:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203221672] [2024-06-20 15:13:52,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203221672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:52,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955929783] [2024-06-20 15:13:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:52,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 264 transitions, 3993 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:52,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,603 INFO L124 PetriNetUnfolderBase]: 1785/3011 cut-off events. [2024-06-20 15:13:52,603 INFO L125 PetriNetUnfolderBase]: For 102254/102257 co-relation queries the response was YES. [2024-06-20 15:13:52,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 3011 events. 1785/3011 cut-off events. For 102254/102257 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18038 event pairs, 358 based on Foata normal form. 5/3014 useless extension candidates. Maximal degree in co-relation 19884. Up to 2363 conditions per place. [2024-06-20 15:13:52,632 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 179 selfloop transitions, 108 changer transitions 0/294 dead transitions. [2024-06-20 15:13:52,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 294 transitions, 5000 flow [2024-06-20 15:13:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:52,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:13:52,633 INFO L175 Difference]: Start difference. First operand has 175 places, 264 transitions, 3993 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:52,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 294 transitions, 5000 flow [2024-06-20 15:13:52,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 4929 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:52,840 INFO L231 Difference]: Finished difference. Result has 182 places, 270 transitions, 4277 flow [2024-06-20 15:13:52,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2024-06-20 15:13:52,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-20 15:13:52,841 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 4277 flow [2024-06-20 15:13:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:13:52,842 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:52,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2083050032, now seen corresponding path program 1 times [2024-06-20 15:13:52,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398117112] [2024-06-20 15:13:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398117112] [2024-06-20 15:13:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398117112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748298186] [2024-06-20 15:13:52,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:52,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:52,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 4277 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:52,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,336 INFO L124 PetriNetUnfolderBase]: 1808/3026 cut-off events. [2024-06-20 15:13:53,337 INFO L125 PetriNetUnfolderBase]: For 112148/112148 co-relation queries the response was YES. [2024-06-20 15:13:53,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3026 events. 1808/3026 cut-off events. For 112148/112148 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 17964 event pairs, 415 based on Foata normal form. 3/3022 useless extension candidates. Maximal degree in co-relation 20691. Up to 2186 conditions per place. [2024-06-20 15:13:53,366 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 116 selfloop transitions, 178 changer transitions 0/301 dead transitions. [2024-06-20 15:13:53,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 301 transitions, 5349 flow [2024-06-20 15:13:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:13:53,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:53,367 INFO L175 Difference]: Start difference. First operand has 182 places, 270 transitions, 4277 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:13:53,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 301 transitions, 5349 flow [2024-06-20 15:13:53,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 301 transitions, 5131 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:53,631 INFO L231 Difference]: Finished difference. Result has 186 places, 281 transitions, 4615 flow [2024-06-20 15:13:53,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4615, PETRI_PLACES=186, PETRI_TRANSITIONS=281} [2024-06-20 15:13:53,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-20 15:13:53,632 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 281 transitions, 4615 flow [2024-06-20 15:13:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:13:53,632 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:53,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1883160192, now seen corresponding path program 2 times [2024-06-20 15:13:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455156085] [2024-06-20 15:13:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455156085] [2024-06-20 15:13:53,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455156085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:53,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366754796] [2024-06-20 15:13:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:53,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:53,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:53,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 281 transitions, 4615 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:53,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,165 INFO L124 PetriNetUnfolderBase]: 1850/3115 cut-off events. [2024-06-20 15:13:54,165 INFO L125 PetriNetUnfolderBase]: For 118289/118289 co-relation queries the response was YES. [2024-06-20 15:13:54,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3115 events. 1850/3115 cut-off events. For 118289/118289 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18699 event pairs, 352 based on Foata normal form. 2/3116 useless extension candidates. Maximal degree in co-relation 21831. Up to 2757 conditions per place. [2024-06-20 15:13:54,196 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 256 selfloop transitions, 50 changer transitions 0/313 dead transitions. [2024-06-20 15:13:54,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 313 transitions, 5761 flow [2024-06-20 15:13:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:13:54,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:13:54,197 INFO L175 Difference]: Start difference. First operand has 186 places, 281 transitions, 4615 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:13:54,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 313 transitions, 5761 flow [2024-06-20 15:13:54,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 313 transitions, 5526 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:54,450 INFO L231 Difference]: Finished difference. Result has 193 places, 295 transitions, 4845 flow [2024-06-20 15:13:54,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4845, PETRI_PLACES=193, PETRI_TRANSITIONS=295} [2024-06-20 15:13:54,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-20 15:13:54,451 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 295 transitions, 4845 flow [2024-06-20 15:13:54,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:13:54,452 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:54,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1159588112, now seen corresponding path program 3 times [2024-06-20 15:13:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481487378] [2024-06-20 15:13:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481487378] [2024-06-20 15:13:54,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481487378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994662186] [2024-06-20 15:13:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:54,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 295 transitions, 4845 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:54,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,049 INFO L124 PetriNetUnfolderBase]: 1857/3136 cut-off events. [2024-06-20 15:13:55,049 INFO L125 PetriNetUnfolderBase]: For 122121/122121 co-relation queries the response was YES. [2024-06-20 15:13:55,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21778 conditions, 3136 events. 1857/3136 cut-off events. For 122121/122121 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18953 event pairs, 349 based on Foata normal form. 3/3138 useless extension candidates. Maximal degree in co-relation 21688. Up to 2430 conditions per place. [2024-06-20 15:13:55,082 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 177 selfloop transitions, 146 changer transitions 0/330 dead transitions. [2024-06-20 15:13:55,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 330 transitions, 5921 flow [2024-06-20 15:13:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:13:55,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:13:55,083 INFO L175 Difference]: Start difference. First operand has 193 places, 295 transitions, 4845 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:13:55,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 330 transitions, 5921 flow [2024-06-20 15:13:55,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 330 transitions, 5857 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:55,356 INFO L231 Difference]: Finished difference. Result has 199 places, 300 transitions, 5186 flow [2024-06-20 15:13:55,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5186, PETRI_PLACES=199, PETRI_TRANSITIONS=300} [2024-06-20 15:13:55,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-20 15:13:55,357 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 300 transitions, 5186 flow [2024-06-20 15:13:55,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:13:55,357 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:55,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1114328531, now seen corresponding path program 1 times [2024-06-20 15:13:55,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179569918] [2024-06-20 15:13:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:55,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179569918] [2024-06-20 15:13:55,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179569918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:55,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:55,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:55,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406709060] [2024-06-20 15:13:55,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:55,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:55,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:55,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:55,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:55,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:55,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 300 transitions, 5186 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:55,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:55,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,988 INFO L124 PetriNetUnfolderBase]: 1960/3279 cut-off events. [2024-06-20 15:13:55,988 INFO L125 PetriNetUnfolderBase]: For 149453/149453 co-relation queries the response was YES. [2024-06-20 15:13:56,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23416 conditions, 3279 events. 1960/3279 cut-off events. For 149453/149453 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19731 event pairs, 305 based on Foata normal form. 12/3281 useless extension candidates. Maximal degree in co-relation 23324. Up to 2400 conditions per place. [2024-06-20 15:13:56,022 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 104 changer transitions 0/344 dead transitions. [2024-06-20 15:13:56,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 344 transitions, 6414 flow [2024-06-20 15:13:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:13:56,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-20 15:13:56,024 INFO L175 Difference]: Start difference. First operand has 199 places, 300 transitions, 5186 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:13:56,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 344 transitions, 6414 flow [2024-06-20 15:13:56,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 344 transitions, 6260 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:56,326 INFO L231 Difference]: Finished difference. Result has 203 places, 306 transitions, 5348 flow [2024-06-20 15:13:56,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5348, PETRI_PLACES=203, PETRI_TRANSITIONS=306} [2024-06-20 15:13:56,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 15:13:56,327 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 306 transitions, 5348 flow [2024-06-20 15:13:56,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:13:56,327 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 77664987, now seen corresponding path program 2 times [2024-06-20 15:13:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085874331] [2024-06-20 15:13:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085874331] [2024-06-20 15:13:56,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085874331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309994544] [2024-06-20 15:13:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:56,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 306 transitions, 5348 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:56,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:56,921 INFO L124 PetriNetUnfolderBase]: 2004/3347 cut-off events. [2024-06-20 15:13:56,921 INFO L125 PetriNetUnfolderBase]: For 151809/151809 co-relation queries the response was YES. [2024-06-20 15:13:56,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24231 conditions, 3347 events. 2004/3347 cut-off events. For 151809/151809 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20220 event pairs, 421 based on Foata normal form. 12/3349 useless extension candidates. Maximal degree in co-relation 24137. Up to 2714 conditions per place. [2024-06-20 15:13:56,955 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 99 changer transitions 0/339 dead transitions. [2024-06-20 15:13:56,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 339 transitions, 6410 flow [2024-06-20 15:13:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:13:56,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:13:56,957 INFO L175 Difference]: Start difference. First operand has 203 places, 306 transitions, 5348 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:13:56,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 339 transitions, 6410 flow [2024-06-20 15:13:57,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 339 transitions, 6234 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:57,283 INFO L231 Difference]: Finished difference. Result has 207 places, 309 transitions, 5433 flow [2024-06-20 15:13:57,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5433, PETRI_PLACES=207, PETRI_TRANSITIONS=309} [2024-06-20 15:13:57,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-20 15:13:57,284 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 309 transitions, 5433 flow [2024-06-20 15:13:57,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:57,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:13:57,285 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:57,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,285 INFO L85 PathProgramCache]: Analyzing trace with hash 364552317, now seen corresponding path program 3 times [2024-06-20 15:13:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766384911] [2024-06-20 15:13:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766384911] [2024-06-20 15:13:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766384911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533411266] [2024-06-20 15:13:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:57,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:57,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 309 transitions, 5433 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:57,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:57,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,958 INFO L124 PetriNetUnfolderBase]: 2048/3414 cut-off events. [2024-06-20 15:13:57,958 INFO L125 PetriNetUnfolderBase]: For 157500/157500 co-relation queries the response was YES. [2024-06-20 15:13:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 3414 events. 2048/3414 cut-off events. For 157500/157500 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20664 event pairs, 426 based on Foata normal form. 12/3416 useless extension candidates. Maximal degree in co-relation 24754. Up to 2782 conditions per place. [2024-06-20 15:13:58,002 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 237 selfloop transitions, 91 changer transitions 0/335 dead transitions. [2024-06-20 15:13:58,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 335 transitions, 6383 flow [2024-06-20 15:13:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:13:58,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:13:58,003 INFO L175 Difference]: Start difference. First operand has 207 places, 309 transitions, 5433 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:13:58,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 335 transitions, 6383 flow [2024-06-20 15:13:58,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 335 transitions, 6170 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:58,379 INFO L231 Difference]: Finished difference. Result has 209 places, 312 transitions, 5463 flow [2024-06-20 15:13:58,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5463, PETRI_PLACES=209, PETRI_TRANSITIONS=312} [2024-06-20 15:13:58,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-20 15:13:58,383 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 312 transitions, 5463 flow [2024-06-20 15:13:58,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:13:58,389 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:58,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 187544115, now seen corresponding path program 1 times [2024-06-20 15:13:58,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028029861] [2024-06-20 15:13:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028029861] [2024-06-20 15:13:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028029861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143306074] [2024-06-20 15:13:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:58,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:58,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 312 transitions, 5463 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:58,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,035 INFO L124 PetriNetUnfolderBase]: 2074/3457 cut-off events. [2024-06-20 15:13:59,035 INFO L125 PetriNetUnfolderBase]: For 156257/156257 co-relation queries the response was YES. [2024-06-20 15:13:59,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25400 conditions, 3457 events. 2074/3457 cut-off events. For 156257/156257 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20897 event pairs, 447 based on Foata normal form. 2/3449 useless extension candidates. Maximal degree in co-relation 25303. Up to 2528 conditions per place. [2024-06-20 15:13:59,075 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 191 changer transitions 0/345 dead transitions. [2024-06-20 15:13:59,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 345 transitions, 6666 flow [2024-06-20 15:13:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:13:59,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:59,077 INFO L175 Difference]: Start difference. First operand has 209 places, 312 transitions, 5463 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:13:59,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 345 transitions, 6666 flow [2024-06-20 15:13:59,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 345 transitions, 6463 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:59,424 INFO L231 Difference]: Finished difference. Result has 212 places, 322 transitions, 5886 flow [2024-06-20 15:13:59,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5886, PETRI_PLACES=212, PETRI_TRANSITIONS=322} [2024-06-20 15:13:59,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 15:13:59,425 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 322 transitions, 5886 flow [2024-06-20 15:13:59,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:59,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:59,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:13:59,426 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:59,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:59,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1351171189, now seen corresponding path program 1 times [2024-06-20 15:13:59,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:59,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085412429] [2024-06-20 15:13:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:59,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085412429] [2024-06-20 15:13:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085412429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359357005] [2024-06-20 15:13:59,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:59,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:59,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 322 transitions, 5886 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:59,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:00,068 INFO L124 PetriNetUnfolderBase]: 2084/3473 cut-off events. [2024-06-20 15:14:00,068 INFO L125 PetriNetUnfolderBase]: For 164128/164128 co-relation queries the response was YES. [2024-06-20 15:14:00,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26013 conditions, 3473 events. 2084/3473 cut-off events. For 164128/164128 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21054 event pairs, 421 based on Foata normal form. 2/3465 useless extension candidates. Maximal degree in co-relation 25914. Up to 2872 conditions per place. [2024-06-20 15:14:00,105 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 246 selfloop transitions, 95 changer transitions 0/348 dead transitions. [2024-06-20 15:14:00,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 348 transitions, 6882 flow [2024-06-20 15:14:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:14:00,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:14:00,107 INFO L175 Difference]: Start difference. First operand has 212 places, 322 transitions, 5886 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:14:00,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 348 transitions, 6882 flow [2024-06-20 15:14:00,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 348 transitions, 6625 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:00,534 INFO L231 Difference]: Finished difference. Result has 216 places, 326 transitions, 5900 flow [2024-06-20 15:14:00,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5900, PETRI_PLACES=216, PETRI_TRANSITIONS=326} [2024-06-20 15:14:00,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 15:14:00,535 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 326 transitions, 5900 flow [2024-06-20 15:14:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:00,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:14:00,536 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:00,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1015673483, now seen corresponding path program 2 times [2024-06-20 15:14:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779532977] [2024-06-20 15:14:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779532977] [2024-06-20 15:14:00,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779532977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:00,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977402712] [2024-06-20 15:14:00,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:00,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:00,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:00,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 326 transitions, 5900 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:00,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:00,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,129 INFO L124 PetriNetUnfolderBase]: 2094/3486 cut-off events. [2024-06-20 15:14:01,129 INFO L125 PetriNetUnfolderBase]: For 169674/169674 co-relation queries the response was YES. [2024-06-20 15:14:01,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25986 conditions, 3486 events. 2094/3486 cut-off events. For 169674/169674 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21094 event pairs, 447 based on Foata normal form. 2/3478 useless extension candidates. Maximal degree in co-relation 25886. Up to 2540 conditions per place. [2024-06-20 15:14:01,168 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 185 changer transitions 0/350 dead transitions. [2024-06-20 15:14:01,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 350 transitions, 6996 flow [2024-06-20 15:14:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:01,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:14:01,169 INFO L175 Difference]: Start difference. First operand has 216 places, 326 transitions, 5900 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:01,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 350 transitions, 6996 flow [2024-06-20 15:14:01,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 350 transitions, 6784 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:01,649 INFO L231 Difference]: Finished difference. Result has 218 places, 330 transitions, 6144 flow [2024-06-20 15:14:01,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5688, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6144, PETRI_PLACES=218, PETRI_TRANSITIONS=330} [2024-06-20 15:14:01,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 15:14:01,650 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 330 transitions, 6144 flow [2024-06-20 15:14:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:01,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:01,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:14:01,650 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:01,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1104077513, now seen corresponding path program 3 times [2024-06-20 15:14:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314614002] [2024-06-20 15:14:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:01,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:01,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314614002] [2024-06-20 15:14:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314614002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:01,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789762288] [2024-06-20 15:14:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:01,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:01,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 330 transitions, 6144 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:01,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,305 INFO L124 PetriNetUnfolderBase]: 2088/3478 cut-off events. [2024-06-20 15:14:02,309 INFO L125 PetriNetUnfolderBase]: For 175048/175048 co-relation queries the response was YES. [2024-06-20 15:14:02,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26258 conditions, 3478 events. 2088/3478 cut-off events. For 175048/175048 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21079 event pairs, 446 based on Foata normal form. 2/3470 useless extension candidates. Maximal degree in co-relation 26157. Up to 2537 conditions per place. [2024-06-20 15:14:02,353 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 185 changer transitions 0/350 dead transitions. [2024-06-20 15:14:02,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 350 transitions, 7172 flow [2024-06-20 15:14:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:02,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:14:02,355 INFO L175 Difference]: Start difference. First operand has 218 places, 330 transitions, 6144 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:02,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 350 transitions, 7172 flow [2024-06-20 15:14:02,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 350 transitions, 6817 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:02,824 INFO L231 Difference]: Finished difference. Result has 221 places, 330 transitions, 6166 flow [2024-06-20 15:14:02,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5789, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6166, PETRI_PLACES=221, PETRI_TRANSITIONS=330} [2024-06-20 15:14:02,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 15:14:02,825 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 330 transitions, 6166 flow [2024-06-20 15:14:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:14:02,826 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1088011421, now seen corresponding path program 2 times [2024-06-20 15:14:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374755745] [2024-06-20 15:14:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374755745] [2024-06-20 15:14:02,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374755745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:02,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322031597] [2024-06-20 15:14:02,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:02,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:02,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:02,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 330 transitions, 6166 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:02,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,472 INFO L124 PetriNetUnfolderBase]: 2098/3502 cut-off events. [2024-06-20 15:14:03,472 INFO L125 PetriNetUnfolderBase]: For 181190/181190 co-relation queries the response was YES. [2024-06-20 15:14:03,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26515 conditions, 3502 events. 2098/3502 cut-off events. For 181190/181190 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21255 event pairs, 420 based on Foata normal form. 2/3494 useless extension candidates. Maximal degree in co-relation 26413. Up to 2888 conditions per place. [2024-06-20 15:14:03,510 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 254 selfloop transitions, 96 changer transitions 0/357 dead transitions. [2024-06-20 15:14:03,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 357 transitions, 7320 flow [2024-06-20 15:14:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:14:03,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:14:03,511 INFO L175 Difference]: Start difference. First operand has 221 places, 330 transitions, 6166 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:14:03,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 357 transitions, 7320 flow [2024-06-20 15:14:03,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 357 transitions, 6964 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:03,959 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 6115 flow [2024-06-20 15:14:03,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6115, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2024-06-20 15:14:03,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 15:14:03,960 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 6115 flow [2024-06-20 15:14:03,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:14:03,961 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:03,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1388352423, now seen corresponding path program 1 times [2024-06-20 15:14:03,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394207801] [2024-06-20 15:14:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394207801] [2024-06-20 15:14:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394207801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:04,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412657984] [2024-06-20 15:14:04,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:04,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:04,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 6115 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:04,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,595 INFO L124 PetriNetUnfolderBase]: 2106/3523 cut-off events. [2024-06-20 15:14:04,596 INFO L125 PetriNetUnfolderBase]: For 184002/184002 co-relation queries the response was YES. [2024-06-20 15:14:04,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26435 conditions, 3523 events. 2106/3523 cut-off events. For 184002/184002 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21496 event pairs, 389 based on Foata normal form. 2/3524 useless extension candidates. Maximal degree in co-relation 26332. Up to 3176 conditions per place. [2024-06-20 15:14:04,635 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 322 selfloop transitions, 27 changer transitions 0/356 dead transitions. [2024-06-20 15:14:04,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 356 transitions, 6905 flow [2024-06-20 15:14:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:14:04,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:14:04,636 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 6115 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:14:04,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 356 transitions, 6905 flow [2024-06-20 15:14:05,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 356 transitions, 6726 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:05,054 INFO L231 Difference]: Finished difference. Result has 228 places, 338 transitions, 6047 flow [2024-06-20 15:14:05,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6047, PETRI_PLACES=228, PETRI_TRANSITIONS=338} [2024-06-20 15:14:05,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-20 15:14:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 338 transitions, 6047 flow [2024-06-20 15:14:05,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:05,055 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1764997797, now seen corresponding path program 4 times [2024-06-20 15:14:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538795868] [2024-06-20 15:14:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538795868] [2024-06-20 15:14:05,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538795868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:05,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911281883] [2024-06-20 15:14:05,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:05,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:05,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:05,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 338 transitions, 6047 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:05,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,798 INFO L124 PetriNetUnfolderBase]: 2256/3770 cut-off events. [2024-06-20 15:14:05,798 INFO L125 PetriNetUnfolderBase]: For 258385/258388 co-relation queries the response was YES. [2024-06-20 15:14:05,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27207 conditions, 3770 events. 2256/3770 cut-off events. For 258385/258388 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23127 event pairs, 331 based on Foata normal form. 56/3824 useless extension candidates. Maximal degree in co-relation 27102. Up to 2792 conditions per place. [2024-06-20 15:14:05,841 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 262 selfloop transitions, 107 changer transitions 1/377 dead transitions. [2024-06-20 15:14:05,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 377 transitions, 7055 flow [2024-06-20 15:14:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:14:05,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-20 15:14:05,843 INFO L175 Difference]: Start difference. First operand has 228 places, 338 transitions, 6047 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:14:05,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 377 transitions, 7055 flow [2024-06-20 15:14:06,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 377 transitions, 6960 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:06,297 INFO L231 Difference]: Finished difference. Result has 230 places, 340 transitions, 6221 flow [2024-06-20 15:14:06,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6221, PETRI_PLACES=230, PETRI_TRANSITIONS=340} [2024-06-20 15:14:06,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-20 15:14:06,298 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 340 transitions, 6221 flow [2024-06-20 15:14:06,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:06,299 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:06,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash 150028661, now seen corresponding path program 3 times [2024-06-20 15:14:06,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488998865] [2024-06-20 15:14:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488998865] [2024-06-20 15:14:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488998865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640628596] [2024-06-20 15:14:06,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:06,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:06,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 340 transitions, 6221 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:06,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,937 INFO L124 PetriNetUnfolderBase]: 2243/3732 cut-off events. [2024-06-20 15:14:06,938 INFO L125 PetriNetUnfolderBase]: For 195747/195747 co-relation queries the response was YES. [2024-06-20 15:14:06,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27668 conditions, 3732 events. 2243/3732 cut-off events. For 195747/195747 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22815 event pairs, 473 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 27562. Up to 3130 conditions per place. [2024-06-20 15:14:06,980 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 245 selfloop transitions, 107 changer transitions 0/359 dead transitions. [2024-06-20 15:14:06,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 359 transitions, 7183 flow [2024-06-20 15:14:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:14:06,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:14:06,981 INFO L175 Difference]: Start difference. First operand has 230 places, 340 transitions, 6221 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:14:06,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 359 transitions, 7183 flow [2024-06-20 15:14:07,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 359 transitions, 6939 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:07,600 INFO L231 Difference]: Finished difference. Result has 232 places, 340 transitions, 6197 flow [2024-06-20 15:14:07,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=232, PETRI_TRANSITIONS=340} [2024-06-20 15:14:07,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 15:14:07,601 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 340 transitions, 6197 flow [2024-06-20 15:14:07,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:07,601 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:07,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1387757191, now seen corresponding path program 4 times [2024-06-20 15:14:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226703812] [2024-06-20 15:14:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226703812] [2024-06-20 15:14:07,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226703812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907612668] [2024-06-20 15:14:07,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:07,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 340 transitions, 6197 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:07,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,242 INFO L124 PetriNetUnfolderBase]: 2240/3734 cut-off events. [2024-06-20 15:14:08,242 INFO L125 PetriNetUnfolderBase]: For 198756/198756 co-relation queries the response was YES. [2024-06-20 15:14:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27461 conditions, 3734 events. 2240/3734 cut-off events. For 198756/198756 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22932 event pairs, 474 based on Foata normal form. 1/3728 useless extension candidates. Maximal degree in co-relation 27354. Up to 3128 conditions per place. [2024-06-20 15:14:08,282 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 248 selfloop transitions, 103 changer transitions 0/358 dead transitions. [2024-06-20 15:14:08,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 358 transitions, 7051 flow [2024-06-20 15:14:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:14:08,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:14:08,284 INFO L175 Difference]: Start difference. First operand has 232 places, 340 transitions, 6197 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:14:08,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 358 transitions, 7051 flow [2024-06-20 15:14:08,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 358 transitions, 6791 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:08,701 INFO L231 Difference]: Finished difference. Result has 234 places, 340 transitions, 6151 flow [2024-06-20 15:14:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6151, PETRI_PLACES=234, PETRI_TRANSITIONS=340} [2024-06-20 15:14:08,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 15:14:08,702 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 340 transitions, 6151 flow [2024-06-20 15:14:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:08,703 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1397063297, now seen corresponding path program 4 times [2024-06-20 15:14:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338479962] [2024-06-20 15:14:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338479962] [2024-06-20 15:14:08,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338479962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116891416] [2024-06-20 15:14:08,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 340 transitions, 6151 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:08,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,314 INFO L124 PetriNetUnfolderBase]: 2230/3708 cut-off events. [2024-06-20 15:14:09,314 INFO L125 PetriNetUnfolderBase]: For 197393/197393 co-relation queries the response was YES. [2024-06-20 15:14:09,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27135 conditions, 3708 events. 2230/3708 cut-off events. For 197393/197393 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22663 event pairs, 499 based on Foata normal form. 2/3703 useless extension candidates. Maximal degree in co-relation 27027. Up to 2777 conditions per place. [2024-06-20 15:14:09,356 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 208 changer transitions 0/360 dead transitions. [2024-06-20 15:14:09,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 360 transitions, 7229 flow [2024-06-20 15:14:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:14:09,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:14:09,359 INFO L175 Difference]: Start difference. First operand has 234 places, 340 transitions, 6151 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:14:09,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 360 transitions, 7229 flow [2024-06-20 15:14:09,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 360 transitions, 7009 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:09,872 INFO L231 Difference]: Finished difference. Result has 237 places, 340 transitions, 6354 flow [2024-06-20 15:14:09,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6354, PETRI_PLACES=237, PETRI_TRANSITIONS=340} [2024-06-20 15:14:09,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-20 15:14:09,873 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 340 transitions, 6354 flow [2024-06-20 15:14:09,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:09,874 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:09,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1407240287, now seen corresponding path program 5 times [2024-06-20 15:14:09,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751559842] [2024-06-20 15:14:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751559842] [2024-06-20 15:14:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751559842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704244424] [2024-06-20 15:14:09,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:09,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 340 transitions, 6354 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:09,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,506 INFO L124 PetriNetUnfolderBase]: 2224/3721 cut-off events. [2024-06-20 15:14:10,506 INFO L125 PetriNetUnfolderBase]: For 197702/197702 co-relation queries the response was YES. [2024-06-20 15:14:10,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27386 conditions, 3721 events. 2224/3721 cut-off events. For 197702/197702 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22864 event pairs, 431 based on Foata normal form. 2/3722 useless extension candidates. Maximal degree in co-relation 27277. Up to 3347 conditions per place. [2024-06-20 15:14:10,550 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 301 selfloop transitions, 50 changer transitions 0/358 dead transitions. [2024-06-20 15:14:10,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 358 transitions, 7327 flow [2024-06-20 15:14:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:14:10,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:14:10,552 INFO L175 Difference]: Start difference. First operand has 237 places, 340 transitions, 6354 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:14:10,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 358 transitions, 7327 flow [2024-06-20 15:14:11,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 358 transitions, 6387 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-20 15:14:11,057 INFO L231 Difference]: Finished difference. Result has 232 places, 340 transitions, 5521 flow [2024-06-20 15:14:11,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5521, PETRI_PLACES=232, PETRI_TRANSITIONS=340} [2024-06-20 15:14:11,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 15:14:11,058 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 340 transitions, 5521 flow [2024-06-20 15:14:11,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:11,058 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:11,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1764874479, now seen corresponding path program 6 times [2024-06-20 15:14:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602009880] [2024-06-20 15:14:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602009880] [2024-06-20 15:14:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602009880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459202437] [2024-06-20 15:14:11,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:11,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:11,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 340 transitions, 5521 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:11,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,699 INFO L124 PetriNetUnfolderBase]: 2234/3740 cut-off events. [2024-06-20 15:14:11,700 INFO L125 PetriNetUnfolderBase]: For 196881/196884 co-relation queries the response was YES. [2024-06-20 15:14:11,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26595 conditions, 3740 events. 2234/3740 cut-off events. For 196881/196884 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22995 event pairs, 438 based on Foata normal form. 4/3742 useless extension candidates. Maximal degree in co-relation 26487. Up to 3010 conditions per place. [2024-06-20 15:14:11,739 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 228 selfloop transitions, 135 changer transitions 0/370 dead transitions. [2024-06-20 15:14:11,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 370 transitions, 6722 flow [2024-06-20 15:14:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:14:11,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:14:11,741 INFO L175 Difference]: Start difference. First operand has 232 places, 340 transitions, 5521 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:14:11,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 370 transitions, 6722 flow [2024-06-20 15:14:12,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 370 transitions, 6598 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:12,256 INFO L231 Difference]: Finished difference. Result has 233 places, 344 transitions, 5749 flow [2024-06-20 15:14:12,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5749, PETRI_PLACES=233, PETRI_TRANSITIONS=344} [2024-06-20 15:14:12,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:14:12,257 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 344 transitions, 5749 flow [2024-06-20 15:14:12,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:12,258 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:12,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1652327999, now seen corresponding path program 7 times [2024-06-20 15:14:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826584440] [2024-06-20 15:14:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826584440] [2024-06-20 15:14:12,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826584440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663998154] [2024-06-20 15:14:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:12,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:12,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 344 transitions, 5749 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:12,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:12,941 INFO L124 PetriNetUnfolderBase]: 2226/3725 cut-off events. [2024-06-20 15:14:12,942 INFO L125 PetriNetUnfolderBase]: For 200941/200941 co-relation queries the response was YES. [2024-06-20 15:14:12,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26801 conditions, 3725 events. 2226/3725 cut-off events. For 200941/200941 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22894 event pairs, 430 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 26692. Up to 3004 conditions per place. [2024-06-20 15:14:12,978 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 147 changer transitions 0/374 dead transitions. [2024-06-20 15:14:12,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 374 transitions, 6899 flow [2024-06-20 15:14:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:14:12,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-20 15:14:12,979 INFO L175 Difference]: Start difference. First operand has 233 places, 344 transitions, 5749 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:14:12,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 374 transitions, 6899 flow [2024-06-20 15:14:13,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 6653 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:13,445 INFO L231 Difference]: Finished difference. Result has 236 places, 344 transitions, 5809 flow [2024-06-20 15:14:13,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5809, PETRI_PLACES=236, PETRI_TRANSITIONS=344} [2024-06-20 15:14:13,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-20 15:14:13,446 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 344 transitions, 5809 flow [2024-06-20 15:14:13,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:13,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:13,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:13,447 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:13,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1764867969, now seen corresponding path program 8 times [2024-06-20 15:14:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:13,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400086120] [2024-06-20 15:14:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:13,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400086120] [2024-06-20 15:14:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400086120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907916484] [2024-06-20 15:14:13,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:13,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:13,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 344 transitions, 5809 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:13,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:14,099 INFO L124 PetriNetUnfolderBase]: 2218/3716 cut-off events. [2024-06-20 15:14:14,099 INFO L125 PetriNetUnfolderBase]: For 204841/204844 co-relation queries the response was YES. [2024-06-20 15:14:14,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 3716 events. 2218/3716 cut-off events. For 204841/204844 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22881 event pairs, 438 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 26646. Up to 2999 conditions per place. [2024-06-20 15:14:14,142 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 129 changer transitions 0/366 dead transitions. [2024-06-20 15:14:14,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 366 transitions, 6813 flow [2024-06-20 15:14:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:14,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:14:14,144 INFO L175 Difference]: Start difference. First operand has 236 places, 344 transitions, 5809 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:14,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 366 transitions, 6813 flow [2024-06-20 15:14:14,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 366 transitions, 6330 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:14,592 INFO L231 Difference]: Finished difference. Result has 234 places, 344 transitions, 5597 flow [2024-06-20 15:14:14,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5597, PETRI_PLACES=234, PETRI_TRANSITIONS=344} [2024-06-20 15:14:14,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 15:14:14,593 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 344 transitions, 5597 flow [2024-06-20 15:14:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:14,594 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:14,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1365131091, now seen corresponding path program 2 times [2024-06-20 15:14:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140401544] [2024-06-20 15:14:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140401544] [2024-06-20 15:14:14,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140401544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264125885] [2024-06-20 15:14:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:14,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:14,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 344 transitions, 5597 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:14,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,284 INFO L124 PetriNetUnfolderBase]: 2226/3725 cut-off events. [2024-06-20 15:14:15,285 INFO L125 PetriNetUnfolderBase]: For 203575/203575 co-relation queries the response was YES. [2024-06-20 15:14:15,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26602 conditions, 3725 events. 2226/3725 cut-off events. For 203575/203575 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22853 event pairs, 432 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 26493. Up to 3391 conditions per place. [2024-06-20 15:14:15,318 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 336 selfloop transitions, 19 changer transitions 0/362 dead transitions. [2024-06-20 15:14:15,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 362 transitions, 6399 flow [2024-06-20 15:14:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 15:14:15,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-20 15:14:15,320 INFO L175 Difference]: Start difference. First operand has 234 places, 344 transitions, 5597 flow. Second operand 5 states and 121 transitions. [2024-06-20 15:14:15,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 362 transitions, 6399 flow [2024-06-20 15:14:15,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 362 transitions, 6087 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:15,719 INFO L231 Difference]: Finished difference. Result has 232 places, 346 transitions, 5384 flow [2024-06-20 15:14:15,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5287, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5384, PETRI_PLACES=232, PETRI_TRANSITIONS=346} [2024-06-20 15:14:15,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 15:14:15,720 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 346 transitions, 5384 flow [2024-06-20 15:14:15,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:15,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:15,721 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:15,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1350846291, now seen corresponding path program 3 times [2024-06-20 15:14:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436265272] [2024-06-20 15:14:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:15,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:15,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436265272] [2024-06-20 15:14:15,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436265272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:15,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:15,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:15,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287751439] [2024-06-20 15:14:15,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:15,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:15,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:15,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:15,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 346 transitions, 5384 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:15,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:15,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:15,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:16,358 INFO L124 PetriNetUnfolderBase]: 2234/3737 cut-off events. [2024-06-20 15:14:16,359 INFO L125 PetriNetUnfolderBase]: For 201802/201802 co-relation queries the response was YES. [2024-06-20 15:14:16,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26283 conditions, 3737 events. 2234/3737 cut-off events. For 201802/201802 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22920 event pairs, 430 based on Foata normal form. 2/3738 useless extension candidates. Maximal degree in co-relation 26173. Up to 3389 conditions per place. [2024-06-20 15:14:16,399 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 336 selfloop transitions, 23 changer transitions 0/366 dead transitions. [2024-06-20 15:14:16,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 366 transitions, 6200 flow [2024-06-20 15:14:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:14:16,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:14:16,400 INFO L175 Difference]: Start difference. First operand has 232 places, 346 transitions, 5384 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:14:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 366 transitions, 6200 flow [2024-06-20 15:14:16,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 366 transitions, 6115 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:16,851 INFO L231 Difference]: Finished difference. Result has 235 places, 348 transitions, 5408 flow [2024-06-20 15:14:16,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5408, PETRI_PLACES=235, PETRI_TRANSITIONS=348} [2024-06-20 15:14:16,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 15:14:16,852 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 348 transitions, 5408 flow [2024-06-20 15:14:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:16,853 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:16,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash 809616605, now seen corresponding path program 4 times [2024-06-20 15:14:16,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784210602] [2024-06-20 15:14:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784210602] [2024-06-20 15:14:16,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784210602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779980080] [2024-06-20 15:14:16,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:16,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:16,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:16,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 348 transitions, 5408 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:16,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,573 INFO L124 PetriNetUnfolderBase]: 2229/3732 cut-off events. [2024-06-20 15:14:17,573 INFO L125 PetriNetUnfolderBase]: For 204384/204384 co-relation queries the response was YES. [2024-06-20 15:14:17,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26177 conditions, 3732 events. 2229/3732 cut-off events. For 204384/204384 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22903 event pairs, 431 based on Foata normal form. 2/3733 useless extension candidates. Maximal degree in co-relation 26066. Up to 3393 conditions per place. [2024-06-20 15:14:17,611 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 338 selfloop transitions, 22 changer transitions 0/367 dead transitions. [2024-06-20 15:14:17,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 367 transitions, 6228 flow [2024-06-20 15:14:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 15:14:17,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 15:14:17,613 INFO L175 Difference]: Start difference. First operand has 235 places, 348 transitions, 5408 flow. Second operand 6 states and 139 transitions. [2024-06-20 15:14:17,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 367 transitions, 6228 flow [2024-06-20 15:14:18,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 367 transitions, 6135 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:18,120 INFO L231 Difference]: Finished difference. Result has 237 places, 350 transitions, 5426 flow [2024-06-20 15:14:18,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5426, PETRI_PLACES=237, PETRI_TRANSITIONS=350} [2024-06-20 15:14:18,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-20 15:14:18,121 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 350 transitions, 5426 flow [2024-06-20 15:14:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:14:18,122 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:18,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1151396203, now seen corresponding path program 1 times [2024-06-20 15:14:18,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843903112] [2024-06-20 15:14:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:18,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:18,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843903112] [2024-06-20 15:14:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843903112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:18,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:18,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139077328] [2024-06-20 15:14:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:18,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:18,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 350 transitions, 5426 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:18,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:18,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,863 INFO L124 PetriNetUnfolderBase]: 2332/3875 cut-off events. [2024-06-20 15:14:18,863 INFO L125 PetriNetUnfolderBase]: For 250061/250061 co-relation queries the response was YES. [2024-06-20 15:14:18,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27523 conditions, 3875 events. 2332/3875 cut-off events. For 250061/250061 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23815 event pairs, 411 based on Foata normal form. 12/3880 useless extension candidates. Maximal degree in co-relation 27411. Up to 2990 conditions per place. [2024-06-20 15:14:18,905 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 115 changer transitions 0/386 dead transitions. [2024-06-20 15:14:18,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 386 transitions, 6618 flow [2024-06-20 15:14:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:14:18,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-20 15:14:18,906 INFO L175 Difference]: Start difference. First operand has 237 places, 350 transitions, 5426 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:14:18,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 386 transitions, 6618 flow [2024-06-20 15:14:19,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 386 transitions, 6523 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:19,480 INFO L231 Difference]: Finished difference. Result has 240 places, 356 transitions, 5673 flow [2024-06-20 15:14:19,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5673, PETRI_PLACES=240, PETRI_TRANSITIONS=356} [2024-06-20 15:14:19,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-20 15:14:19,480 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 356 transitions, 5673 flow [2024-06-20 15:14:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:19,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:19,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:14:19,481 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:19,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1636281059, now seen corresponding path program 2 times [2024-06-20 15:14:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:19,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27669592] [2024-06-20 15:14:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:19,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27669592] [2024-06-20 15:14:19,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27669592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87221541] [2024-06-20 15:14:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:19,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:19,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 356 transitions, 5673 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:19,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:20,205 INFO L124 PetriNetUnfolderBase]: 2376/3945 cut-off events. [2024-06-20 15:14:20,205 INFO L125 PetriNetUnfolderBase]: For 259716/259716 co-relation queries the response was YES. [2024-06-20 15:14:20,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 3945 events. 2376/3945 cut-off events. For 259716/259716 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24266 event pairs, 501 based on Foata normal form. 12/3950 useless extension candidates. Maximal degree in co-relation 28345. Up to 3296 conditions per place. [2024-06-20 15:14:20,249 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 110 changer transitions 0/381 dead transitions. [2024-06-20 15:14:20,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 381 transitions, 6663 flow [2024-06-20 15:14:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:14:20,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:14:20,250 INFO L175 Difference]: Start difference. First operand has 240 places, 356 transitions, 5673 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:14:20,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 381 transitions, 6663 flow [2024-06-20 15:14:20,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 381 transitions, 6447 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:20,714 INFO L231 Difference]: Finished difference. Result has 244 places, 359 transitions, 5746 flow [2024-06-20 15:14:20,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5746, PETRI_PLACES=244, PETRI_TRANSITIONS=359} [2024-06-20 15:14:20,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-20 15:14:20,715 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 359 transitions, 5746 flow [2024-06-20 15:14:20,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:20,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:20,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:14:20,716 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:20,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1751572229, now seen corresponding path program 3 times [2024-06-20 15:14:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:20,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103471461] [2024-06-20 15:14:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103471461] [2024-06-20 15:14:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103471461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605456991] [2024-06-20 15:14:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:20,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:20,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 359 transitions, 5746 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:20,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,477 INFO L124 PetriNetUnfolderBase]: 2448/4077 cut-off events. [2024-06-20 15:14:21,477 INFO L125 PetriNetUnfolderBase]: For 281524/281524 co-relation queries the response was YES. [2024-06-20 15:14:21,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29396 conditions, 4077 events. 2448/4077 cut-off events. For 281524/281524 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25337 event pairs, 468 based on Foata normal form. 20/4096 useless extension candidates. Maximal degree in co-relation 29281. Up to 3637 conditions per place. [2024-06-20 15:14:21,522 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 335 selfloop transitions, 42 changer transitions 0/384 dead transitions. [2024-06-20 15:14:21,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 6668 flow [2024-06-20 15:14:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:14:21,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:14:21,523 INFO L175 Difference]: Start difference. First operand has 244 places, 359 transitions, 5746 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:14:21,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 6668 flow [2024-06-20 15:14:22,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 384 transitions, 6423 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:22,107 INFO L231 Difference]: Finished difference. Result has 247 places, 364 transitions, 5701 flow [2024-06-20 15:14:22,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5701, PETRI_PLACES=247, PETRI_TRANSITIONS=364} [2024-06-20 15:14:22,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 15:14:22,108 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 364 transitions, 5701 flow [2024-06-20 15:14:22,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:14:22,109 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1033063375, now seen corresponding path program 1 times [2024-06-20 15:14:22,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319263064] [2024-06-20 15:14:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:22,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:22,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319263064] [2024-06-20 15:14:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319263064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:22,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:22,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:22,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919252857] [2024-06-20 15:14:22,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:22,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:22,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:22,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:22,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 364 transitions, 5701 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:22,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:22,865 INFO L124 PetriNetUnfolderBase]: 2456/4087 cut-off events. [2024-06-20 15:14:22,865 INFO L125 PetriNetUnfolderBase]: For 253657/253657 co-relation queries the response was YES. [2024-06-20 15:14:22,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29424 conditions, 4087 events. 2456/4087 cut-off events. For 253657/253657 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25324 event pairs, 468 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 29308. Up to 3743 conditions per place. [2024-06-20 15:14:22,910 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 351 selfloop transitions, 24 changer transitions 0/382 dead transitions. [2024-06-20 15:14:22,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 382 transitions, 6533 flow [2024-06-20 15:14:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 15:14:22,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:14:22,911 INFO L175 Difference]: Start difference. First operand has 247 places, 364 transitions, 5701 flow. Second operand 7 states and 154 transitions. [2024-06-20 15:14:22,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 382 transitions, 6533 flow [2024-06-20 15:14:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 382 transitions, 6399 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:23,471 INFO L231 Difference]: Finished difference. Result has 249 places, 367 transitions, 5676 flow [2024-06-20 15:14:23,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5676, PETRI_PLACES=249, PETRI_TRANSITIONS=367} [2024-06-20 15:14:23,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-20 15:14:23,472 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 367 transitions, 5676 flow [2024-06-20 15:14:23,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:23,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:14:23,472 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:23,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1587497067, now seen corresponding path program 4 times [2024-06-20 15:14:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45824132] [2024-06-20 15:14:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45824132] [2024-06-20 15:14:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45824132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:23,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:23,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708740875] [2024-06-20 15:14:23,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:23,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:23,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 367 transitions, 5676 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:23,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:23,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,305 INFO L124 PetriNetUnfolderBase]: 2619/4349 cut-off events. [2024-06-20 15:14:24,305 INFO L125 PetriNetUnfolderBase]: For 365225/365225 co-relation queries the response was YES. [2024-06-20 15:14:24,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30408 conditions, 4349 events. 2619/4349 cut-off events. For 365225/365225 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27286 event pairs, 430 based on Foata normal form. 54/4402 useless extension candidates. Maximal degree in co-relation 30290. Up to 3307 conditions per place. [2024-06-20 15:14:24,348 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 284 selfloop transitions, 116 changer transitions 1/408 dead transitions. [2024-06-20 15:14:24,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 408 transitions, 6808 flow [2024-06-20 15:14:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:14:24,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:14:24,349 INFO L175 Difference]: Start difference. First operand has 249 places, 367 transitions, 5676 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:14:24,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 408 transitions, 6808 flow [2024-06-20 15:14:24,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 408 transitions, 6731 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:24,892 INFO L231 Difference]: Finished difference. Result has 253 places, 370 transitions, 5932 flow [2024-06-20 15:14:24,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5932, PETRI_PLACES=253, PETRI_TRANSITIONS=370} [2024-06-20 15:14:24,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-20 15:14:24,892 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 370 transitions, 5932 flow [2024-06-20 15:14:24,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:24,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:14:24,893 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:24,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1587312369, now seen corresponding path program 2 times [2024-06-20 15:14:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:24,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736147253] [2024-06-20 15:14:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736147253] [2024-06-20 15:14:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736147253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:24,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406219217] [2024-06-20 15:14:24,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:24,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:25,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:25,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 370 transitions, 5932 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:25,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:25,624 INFO L124 PetriNetUnfolderBase]: 2622/4359 cut-off events. [2024-06-20 15:14:25,624 INFO L125 PetriNetUnfolderBase]: For 268674/268674 co-relation queries the response was YES. [2024-06-20 15:14:25,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31284 conditions, 4359 events. 2622/4359 cut-off events. For 268674/268674 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27319 event pairs, 515 based on Foata normal form. 2/4360 useless extension candidates. Maximal degree in co-relation 31165. Up to 4006 conditions per place. [2024-06-20 15:14:25,675 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 353 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-20 15:14:25,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 389 transitions, 6823 flow [2024-06-20 15:14:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-20 15:14:25,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:14:25,677 INFO L175 Difference]: Start difference. First operand has 253 places, 370 transitions, 5932 flow. Second operand 6 states and 136 transitions. [2024-06-20 15:14:25,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 389 transitions, 6823 flow [2024-06-20 15:14:26,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 389 transitions, 6543 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:26,283 INFO L231 Difference]: Finished difference. Result has 253 places, 375 transitions, 5815 flow [2024-06-20 15:14:26,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5815, PETRI_PLACES=253, PETRI_TRANSITIONS=375} [2024-06-20 15:14:26,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-20 15:14:26,284 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 375 transitions, 5815 flow [2024-06-20 15:14:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:26,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:26,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:14:26,284 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:26,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1359411219, now seen corresponding path program 3 times [2024-06-20 15:14:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:26,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178574911] [2024-06-20 15:14:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:26,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:26,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:26,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178574911] [2024-06-20 15:14:26,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178574911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:26,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:26,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:26,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940524448] [2024-06-20 15:14:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:26,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:26,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:26,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:26,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 375 transitions, 5815 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:26,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:26,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:27,090 INFO L124 PetriNetUnfolderBase]: 2630/4371 cut-off events. [2024-06-20 15:14:27,091 INFO L125 PetriNetUnfolderBase]: For 264710/264710 co-relation queries the response was YES. [2024-06-20 15:14:27,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30656 conditions, 4371 events. 2630/4371 cut-off events. For 264710/264710 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27440 event pairs, 517 based on Foata normal form. 2/4372 useless extension candidates. Maximal degree in co-relation 30536. Up to 4012 conditions per place. [2024-06-20 15:14:27,131 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 354 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-20 15:14:27,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 390 transitions, 6655 flow [2024-06-20 15:14:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 15:14:27,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-20 15:14:27,133 INFO L175 Difference]: Start difference. First operand has 253 places, 375 transitions, 5815 flow. Second operand 5 states and 118 transitions. [2024-06-20 15:14:27,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 390 transitions, 6655 flow [2024-06-20 15:14:27,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 390 transitions, 6581 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:27,678 INFO L231 Difference]: Finished difference. Result has 256 places, 377 transitions, 5856 flow [2024-06-20 15:14:27,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5856, PETRI_PLACES=256, PETRI_TRANSITIONS=377} [2024-06-20 15:14:27,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 15:14:27,679 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 377 transitions, 5856 flow [2024-06-20 15:14:27,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:14:27,680 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:27,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1350840339, now seen corresponding path program 4 times [2024-06-20 15:14:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217452637] [2024-06-20 15:14:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217452637] [2024-06-20 15:14:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217452637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:27,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913954572] [2024-06-20 15:14:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:27,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:27,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 377 transitions, 5856 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:27,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,409 INFO L124 PetriNetUnfolderBase]: 2625/4357 cut-off events. [2024-06-20 15:14:28,409 INFO L125 PetriNetUnfolderBase]: For 260687/260690 co-relation queries the response was YES. [2024-06-20 15:14:28,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30441 conditions, 4357 events. 2625/4357 cut-off events. For 260687/260690 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 27243 event pairs, 521 based on Foata normal form. 4/4359 useless extension candidates. Maximal degree in co-relation 30320. Up to 3991 conditions per place. [2024-06-20 15:14:28,461 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 353 selfloop transitions, 30 changer transitions 0/390 dead transitions. [2024-06-20 15:14:28,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 390 transitions, 6690 flow [2024-06-20 15:14:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-20 15:14:28,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:28,462 INFO L175 Difference]: Start difference. First operand has 256 places, 377 transitions, 5856 flow. Second operand 5 states and 115 transitions. [2024-06-20 15:14:28,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 390 transitions, 6690 flow [2024-06-20 15:14:29,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 390 transitions, 6601 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:29,011 INFO L231 Difference]: Finished difference. Result has 258 places, 379 transitions, 5878 flow [2024-06-20 15:14:29,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5878, PETRI_PLACES=258, PETRI_TRANSITIONS=379} [2024-06-20 15:14:29,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-20 15:14:29,011 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 379 transitions, 5878 flow [2024-06-20 15:14:29,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:29,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:29,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:14:29,012 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:29,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918283, now seen corresponding path program 1 times [2024-06-20 15:14:29,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:29,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896324449] [2024-06-20 15:14:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:29,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:29,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896324449] [2024-06-20 15:14:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896324449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:29,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:29,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558575962] [2024-06-20 15:14:29,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:29,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:29,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:29,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 379 transitions, 5878 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:29,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:29,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:29,940 INFO L124 PetriNetUnfolderBase]: 2939/4889 cut-off events. [2024-06-20 15:14:29,940 INFO L125 PetriNetUnfolderBase]: For 420280/420280 co-relation queries the response was YES. [2024-06-20 15:14:30,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35365 conditions, 4889 events. 2939/4889 cut-off events. For 420280/420280 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31141 event pairs, 590 based on Foata normal form. 36/4915 useless extension candidates. Maximal degree in co-relation 35243. Up to 2682 conditions per place. [2024-06-20 15:14:30,086 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 232 changer transitions 7/430 dead transitions. [2024-06-20 15:14:30,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 430 transitions, 7516 flow [2024-06-20 15:14:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 15:14:30,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-06-20 15:14:30,087 INFO L175 Difference]: Start difference. First operand has 258 places, 379 transitions, 5878 flow. Second operand 8 states and 215 transitions. [2024-06-20 15:14:30,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 430 transitions, 7516 flow [2024-06-20 15:14:30,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 430 transitions, 7425 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:30,740 INFO L231 Difference]: Finished difference. Result has 263 places, 382 transitions, 6338 flow [2024-06-20 15:14:30,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=263, PETRI_TRANSITIONS=382} [2024-06-20 15:14:30,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-20 15:14:30,741 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 382 transitions, 6338 flow [2024-06-20 15:14:30,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:14:30,741 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:30,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1887351733, now seen corresponding path program 2 times [2024-06-20 15:14:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526673142] [2024-06-20 15:14:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526673142] [2024-06-20 15:14:30,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526673142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:30,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630220470] [2024-06-20 15:14:30,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:30,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:30,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 382 transitions, 6338 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:30,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,739 INFO L124 PetriNetUnfolderBase]: 3216/5338 cut-off events. [2024-06-20 15:14:31,739 INFO L125 PetriNetUnfolderBase]: For 536264/536264 co-relation queries the response was YES. [2024-06-20 15:14:31,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41359 conditions, 5338 events. 3216/5338 cut-off events. For 536264/536264 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34521 event pairs, 832 based on Foata normal form. 36/5364 useless extension candidates. Maximal degree in co-relation 41236. Up to 3825 conditions per place. [2024-06-20 15:14:31,803 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 221 changer transitions 4/426 dead transitions. [2024-06-20 15:14:31,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 426 transitions, 7956 flow [2024-06-20 15:14:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:14:31,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-20 15:14:31,804 INFO L175 Difference]: Start difference. First operand has 263 places, 382 transitions, 6338 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:14:31,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 426 transitions, 7956 flow [2024-06-20 15:14:32,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 426 transitions, 7606 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:32,567 INFO L231 Difference]: Finished difference. Result has 267 places, 385 transitions, 6540 flow [2024-06-20 15:14:32,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5996, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6540, PETRI_PLACES=267, PETRI_TRANSITIONS=385} [2024-06-20 15:14:32,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 15:14:32,567 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 385 transitions, 6540 flow [2024-06-20 15:14:32,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:14:32,568 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:32,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1887025303, now seen corresponding path program 3 times [2024-06-20 15:14:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007978948] [2024-06-20 15:14:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007978948] [2024-06-20 15:14:32,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007978948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836154728] [2024-06-20 15:14:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:32,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:32,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:32,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 385 transitions, 6540 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:32,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,618 INFO L124 PetriNetUnfolderBase]: 3099/5163 cut-off events. [2024-06-20 15:14:33,618 INFO L125 PetriNetUnfolderBase]: For 469366/469366 co-relation queries the response was YES. [2024-06-20 15:14:33,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38265 conditions, 5163 events. 3099/5163 cut-off events. For 469366/469366 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33347 event pairs, 828 based on Foata normal form. 42/5195 useless extension candidates. Maximal degree in co-relation 38140. Up to 3987 conditions per place. [2024-06-20 15:14:33,679 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 192 selfloop transitions, 216 changer transitions 3/418 dead transitions. [2024-06-20 15:14:33,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 418 transitions, 7864 flow [2024-06-20 15:14:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:14:33,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-20 15:14:33,680 INFO L175 Difference]: Start difference. First operand has 267 places, 385 transitions, 6540 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:14:33,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 418 transitions, 7864 flow [2024-06-20 15:14:34,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 418 transitions, 7507 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:34,468 INFO L231 Difference]: Finished difference. Result has 271 places, 384 transitions, 6612 flow [2024-06-20 15:14:34,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6612, PETRI_PLACES=271, PETRI_TRANSITIONS=384} [2024-06-20 15:14:34,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 15:14:34,469 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 384 transitions, 6612 flow [2024-06-20 15:14:34,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:14:34,469 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:34,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1572727905, now seen corresponding path program 4 times [2024-06-20 15:14:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818489525] [2024-06-20 15:14:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:34,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818489525] [2024-06-20 15:14:34,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818489525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:34,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:34,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820574476] [2024-06-20 15:14:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:34,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:34,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:34,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:34,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:34,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 384 transitions, 6612 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:34,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:34,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:35,464 INFO L124 PetriNetUnfolderBase]: 3221/5363 cut-off events. [2024-06-20 15:14:35,464 INFO L125 PetriNetUnfolderBase]: For 483408/483408 co-relation queries the response was YES. [2024-06-20 15:14:35,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39605 conditions, 5363 events. 3221/5363 cut-off events. For 483408/483408 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34966 event pairs, 874 based on Foata normal form. 42/5395 useless extension candidates. Maximal degree in co-relation 39478. Up to 4189 conditions per place. [2024-06-20 15:14:35,529 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 190 changer transitions 3/412 dead transitions. [2024-06-20 15:14:35,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 412 transitions, 7834 flow [2024-06-20 15:14:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:14:35,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:14:35,531 INFO L175 Difference]: Start difference. First operand has 271 places, 384 transitions, 6612 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:14:35,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 412 transitions, 7834 flow [2024-06-20 15:14:36,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 412 transitions, 7394 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:36,380 INFO L231 Difference]: Finished difference. Result has 272 places, 385 transitions, 6610 flow [2024-06-20 15:14:36,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6610, PETRI_PLACES=272, PETRI_TRANSITIONS=385} [2024-06-20 15:14:36,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-20 15:14:36,381 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 385 transitions, 6610 flow [2024-06-20 15:14:36,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:36,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:36,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:14:36,381 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:36,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1583452665, now seen corresponding path program 5 times [2024-06-20 15:14:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055753498] [2024-06-20 15:14:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:36,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:36,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055753498] [2024-06-20 15:14:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055753498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:36,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:36,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356036706] [2024-06-20 15:14:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:36,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:36,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 385 transitions, 6610 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:36,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:36,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:37,511 INFO L124 PetriNetUnfolderBase]: 3343/5587 cut-off events. [2024-06-20 15:14:37,511 INFO L125 PetriNetUnfolderBase]: For 496092/496092 co-relation queries the response was YES. [2024-06-20 15:14:37,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40808 conditions, 5587 events. 3343/5587 cut-off events. For 496092/496092 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36840 event pairs, 934 based on Foata normal form. 42/5619 useless extension candidates. Maximal degree in co-relation 40680. Up to 4391 conditions per place. [2024-06-20 15:14:37,572 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 190 changer transitions 3/413 dead transitions. [2024-06-20 15:14:37,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 413 transitions, 7842 flow [2024-06-20 15:14:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:14:37,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:14:37,574 INFO L175 Difference]: Start difference. First operand has 272 places, 385 transitions, 6610 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:14:37,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 413 transitions, 7842 flow [2024-06-20 15:14:38,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 413 transitions, 7432 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:38,475 INFO L231 Difference]: Finished difference. Result has 274 places, 386 transitions, 6642 flow [2024-06-20 15:14:38,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6642, PETRI_PLACES=274, PETRI_TRANSITIONS=386} [2024-06-20 15:14:38,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 15:14:38,475 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 386 transitions, 6642 flow [2024-06-20 15:14:38,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:38,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:38,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:14:38,476 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:38,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1583779095, now seen corresponding path program 6 times [2024-06-20 15:14:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066582085] [2024-06-20 15:14:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:38,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066582085] [2024-06-20 15:14:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066582085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:38,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:38,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466626157] [2024-06-20 15:14:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:38,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:38,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:38,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 386 transitions, 6642 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:38,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:38,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:39,520 INFO L124 PetriNetUnfolderBase]: 3441/5753 cut-off events. [2024-06-20 15:14:39,520 INFO L125 PetriNetUnfolderBase]: For 497249/497249 co-relation queries the response was YES. [2024-06-20 15:14:39,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41622 conditions, 5753 events. 3441/5753 cut-off events. For 497249/497249 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 38152 event pairs, 918 based on Foata normal form. 36/5779 useless extension candidates. Maximal degree in co-relation 41493. Up to 4163 conditions per place. [2024-06-20 15:14:39,587 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 195 changer transitions 6/420 dead transitions. [2024-06-20 15:14:39,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 420 transitions, 7930 flow [2024-06-20 15:14:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:14:39,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:14:39,589 INFO L175 Difference]: Start difference. First operand has 274 places, 386 transitions, 6642 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:14:39,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 420 transitions, 7930 flow [2024-06-20 15:14:40,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 420 transitions, 7516 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:40,604 INFO L231 Difference]: Finished difference. Result has 276 places, 387 transitions, 6675 flow [2024-06-20 15:14:40,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6228, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6675, PETRI_PLACES=276, PETRI_TRANSITIONS=387} [2024-06-20 15:14:40,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-20 15:14:40,605 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 387 transitions, 6675 flow [2024-06-20 15:14:40,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:40,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:40,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:14:40,605 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:40,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:40,606 INFO L85 PathProgramCache]: Analyzing trace with hash 26816525, now seen corresponding path program 1 times [2024-06-20 15:14:40,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:40,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818290778] [2024-06-20 15:14:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:40,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:40,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:40,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818290778] [2024-06-20 15:14:40,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818290778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:40,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:40,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683932626] [2024-06-20 15:14:40,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:40,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:40,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:40,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 387 transitions, 6675 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:40,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:40,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:41,592 INFO L124 PetriNetUnfolderBase]: 3440/5770 cut-off events. [2024-06-20 15:14:41,592 INFO L125 PetriNetUnfolderBase]: For 432065/432068 co-relation queries the response was YES. [2024-06-20 15:14:41,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42119 conditions, 5770 events. 3440/5770 cut-off events. For 432065/432068 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38512 event pairs, 975 based on Foata normal form. 3/5764 useless extension candidates. Maximal degree in co-relation 41989. Up to 5076 conditions per place. [2024-06-20 15:14:41,657 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 308 selfloop transitions, 103 changer transitions 0/418 dead transitions. [2024-06-20 15:14:41,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 418 transitions, 8211 flow [2024-06-20 15:14:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:14:41,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:14:41,658 INFO L175 Difference]: Start difference. First operand has 276 places, 387 transitions, 6675 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:14:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 418 transitions, 8211 flow [2024-06-20 15:14:42,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 418 transitions, 7766 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:42,741 INFO L231 Difference]: Finished difference. Result has 276 places, 399 transitions, 6684 flow [2024-06-20 15:14:42,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6246, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6684, PETRI_PLACES=276, PETRI_TRANSITIONS=399} [2024-06-20 15:14:42,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-20 15:14:42,742 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 399 transitions, 6684 flow [2024-06-20 15:14:42,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:42,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:14:42,743 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:42,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1502596925, now seen corresponding path program 2 times [2024-06-20 15:14:42,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:42,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4811990] [2024-06-20 15:14:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:42,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4811990] [2024-06-20 15:14:42,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4811990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:42,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565274581] [2024-06-20 15:14:42,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:42,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:42,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 399 transitions, 6684 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:42,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:42,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:43,699 INFO L124 PetriNetUnfolderBase]: 3437/5764 cut-off events. [2024-06-20 15:14:43,700 INFO L125 PetriNetUnfolderBase]: For 434861/434864 co-relation queries the response was YES. [2024-06-20 15:14:43,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41505 conditions, 5764 events. 3437/5764 cut-off events. For 434861/434864 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38425 event pairs, 976 based on Foata normal form. 3/5758 useless extension candidates. Maximal degree in co-relation 41374. Up to 5073 conditions per place. [2024-06-20 15:14:43,767 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 309 selfloop transitions, 99 changer transitions 0/415 dead transitions. [2024-06-20 15:14:43,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 415 transitions, 7970 flow [2024-06-20 15:14:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:14:43,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:14:43,769 INFO L175 Difference]: Start difference. First operand has 276 places, 399 transitions, 6684 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:14:43,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 415 transitions, 7970 flow [2024-06-20 15:14:44,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 415 transitions, 7826 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:44,638 INFO L231 Difference]: Finished difference. Result has 280 places, 399 transitions, 6744 flow [2024-06-20 15:14:44,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6540, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6744, PETRI_PLACES=280, PETRI_TRANSITIONS=399} [2024-06-20 15:14:44,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-20 15:14:44,638 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 399 transitions, 6744 flow [2024-06-20 15:14:44,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:44,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:44,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:44,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:14:44,639 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:44,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1496936015, now seen corresponding path program 3 times [2024-06-20 15:14:44,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:44,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427597309] [2024-06-20 15:14:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:44,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427597309] [2024-06-20 15:14:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427597309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810615105] [2024-06-20 15:14:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:44,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:44,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 399 transitions, 6744 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:44,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:44,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:44,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:45,620 INFO L124 PetriNetUnfolderBase]: 3434/5761 cut-off events. [2024-06-20 15:14:45,621 INFO L125 PetriNetUnfolderBase]: For 443825/443836 co-relation queries the response was YES. [2024-06-20 15:14:45,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41596 conditions, 5761 events. 3434/5761 cut-off events. For 443825/443836 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38481 event pairs, 970 based on Foata normal form. 11/5764 useless extension candidates. Maximal degree in co-relation 41464. Up to 5070 conditions per place. [2024-06-20 15:14:45,690 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 309 selfloop transitions, 104 changer transitions 0/420 dead transitions. [2024-06-20 15:14:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 420 transitions, 7914 flow [2024-06-20 15:14:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:14:45,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:14:45,691 INFO L175 Difference]: Start difference. First operand has 280 places, 399 transitions, 6744 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:14:45,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 420 transitions, 7914 flow [2024-06-20 15:14:46,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 420 transitions, 7717 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:46,566 INFO L231 Difference]: Finished difference. Result has 283 places, 399 transitions, 6761 flow [2024-06-20 15:14:46,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6761, PETRI_PLACES=283, PETRI_TRANSITIONS=399} [2024-06-20 15:14:46,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:14:46,567 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 399 transitions, 6761 flow [2024-06-20 15:14:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:46,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:46,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:14:46,567 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:46,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1497055985, now seen corresponding path program 4 times [2024-06-20 15:14:46,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519880870] [2024-06-20 15:14:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519880870] [2024-06-20 15:14:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519880870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:46,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:46,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961555515] [2024-06-20 15:14:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:46,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:46,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:46,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 399 transitions, 6761 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:46,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:46,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:47,558 INFO L124 PetriNetUnfolderBase]: 3439/5752 cut-off events. [2024-06-20 15:14:47,558 INFO L125 PetriNetUnfolderBase]: For 454474/454474 co-relation queries the response was YES. [2024-06-20 15:14:47,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41729 conditions, 5752 events. 3439/5752 cut-off events. For 454474/454474 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38244 event pairs, 953 based on Foata normal form. 1/5743 useless extension candidates. Maximal degree in co-relation 41597. Up to 5076 conditions per place. [2024-06-20 15:14:47,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 303 selfloop transitions, 117 changer transitions 0/427 dead transitions. [2024-06-20 15:14:47,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 427 transitions, 8015 flow [2024-06-20 15:14:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:47,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:14:47,628 INFO L175 Difference]: Start difference. First operand has 283 places, 399 transitions, 6761 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:47,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 427 transitions, 8015 flow [2024-06-20 15:14:48,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 427 transitions, 7613 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:48,583 INFO L231 Difference]: Finished difference. Result has 283 places, 402 transitions, 6655 flow [2024-06-20 15:14:48,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6655, PETRI_PLACES=283, PETRI_TRANSITIONS=402} [2024-06-20 15:14:48,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:14:48,584 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 402 transitions, 6655 flow [2024-06-20 15:14:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:48,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:48,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:14:48,584 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:48,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash 943767667, now seen corresponding path program 5 times [2024-06-20 15:14:48,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:48,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072598970] [2024-06-20 15:14:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:48,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072598970] [2024-06-20 15:14:48,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072598970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628102975] [2024-06-20 15:14:48,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:48,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:48,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:48,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 402 transitions, 6655 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:48,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:49,593 INFO L124 PetriNetUnfolderBase]: 3436/5752 cut-off events. [2024-06-20 15:14:49,593 INFO L125 PetriNetUnfolderBase]: For 458929/458929 co-relation queries the response was YES. [2024-06-20 15:14:49,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41681 conditions, 5752 events. 3436/5752 cut-off events. For 458929/458929 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38289 event pairs, 946 based on Foata normal form. 1/5743 useless extension candidates. Maximal degree in co-relation 41550. Up to 5073 conditions per place. [2024-06-20 15:14:49,667 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 305 selfloop transitions, 112 changer transitions 0/424 dead transitions. [2024-06-20 15:14:49,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 424 transitions, 7991 flow [2024-06-20 15:14:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:14:49,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-20 15:14:49,668 INFO L175 Difference]: Start difference. First operand has 283 places, 402 transitions, 6655 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:14:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 424 transitions, 7991 flow [2024-06-20 15:14:50,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 424 transitions, 7828 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:50,653 INFO L231 Difference]: Finished difference. Result has 288 places, 402 transitions, 6722 flow [2024-06-20 15:14:50,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6722, PETRI_PLACES=288, PETRI_TRANSITIONS=402} [2024-06-20 15:14:50,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-20 15:14:50,654 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 402 transitions, 6722 flow [2024-06-20 15:14:50,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:50,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:50,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:14:50,654 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:50,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:50,655 INFO L85 PathProgramCache]: Analyzing trace with hash 217646207, now seen corresponding path program 1 times [2024-06-20 15:14:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:50,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391321818] [2024-06-20 15:14:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:50,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:50,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391321818] [2024-06-20 15:14:50,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391321818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:50,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:50,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:50,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071498566] [2024-06-20 15:14:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:50,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:50,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:50,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 402 transitions, 6722 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:50,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:50,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:51,683 INFO L124 PetriNetUnfolderBase]: 3446/5765 cut-off events. [2024-06-20 15:14:51,683 INFO L125 PetriNetUnfolderBase]: For 475335/475335 co-relation queries the response was YES. [2024-06-20 15:14:51,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41989 conditions, 5765 events. 3446/5765 cut-off events. For 475335/475335 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38341 event pairs, 976 based on Foata normal form. 2/5757 useless extension candidates. Maximal degree in co-relation 41856. Up to 4739 conditions per place. [2024-06-20 15:14:51,754 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 210 selfloop transitions, 212 changer transitions 0/429 dead transitions. [2024-06-20 15:14:51,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 429 transitions, 7999 flow [2024-06-20 15:14:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:14:51,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:14:51,756 INFO L175 Difference]: Start difference. First operand has 288 places, 402 transitions, 6722 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:14:51,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 429 transitions, 7999 flow [2024-06-20 15:14:52,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 429 transitions, 7737 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:52,923 INFO L231 Difference]: Finished difference. Result has 289 places, 406 transitions, 6966 flow [2024-06-20 15:14:52,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6966, PETRI_PLACES=289, PETRI_TRANSITIONS=406} [2024-06-20 15:14:52,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-20 15:14:52,924 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 406 transitions, 6966 flow [2024-06-20 15:14:52,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:52,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:52,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:14:52,925 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:52,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash 642108981, now seen corresponding path program 2 times [2024-06-20 15:14:52,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:52,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279840371] [2024-06-20 15:14:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279840371] [2024-06-20 15:14:53,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279840371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:53,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:53,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869261541] [2024-06-20 15:14:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:53,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:53,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 406 transitions, 6966 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:53,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:53,959 INFO L124 PetriNetUnfolderBase]: 3456/5782 cut-off events. [2024-06-20 15:14:53,959 INFO L125 PetriNetUnfolderBase]: For 487304/487304 co-relation queries the response was YES. [2024-06-20 15:14:54,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42610 conditions, 5782 events. 3456/5782 cut-off events. For 487304/487304 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38513 event pairs, 974 based on Foata normal form. 2/5774 useless extension candidates. Maximal degree in co-relation 42477. Up to 4749 conditions per place. [2024-06-20 15:14:54,028 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 217 changer transitions 0/433 dead transitions. [2024-06-20 15:14:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 433 transitions, 8263 flow [2024-06-20 15:14:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:14:54,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:14:54,030 INFO L175 Difference]: Start difference. First operand has 289 places, 406 transitions, 6966 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:14:54,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 433 transitions, 8263 flow [2024-06-20 15:14:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 433 transitions, 7793 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:55,456 INFO L231 Difference]: Finished difference. Result has 291 places, 410 transitions, 7020 flow [2024-06-20 15:14:55,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7020, PETRI_PLACES=291, PETRI_TRANSITIONS=410} [2024-06-20 15:14:55,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-20 15:14:55,457 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 410 transitions, 7020 flow [2024-06-20 15:14:55,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:55,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:14:55,458 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 642131859, now seen corresponding path program 6 times [2024-06-20 15:14:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034081658] [2024-06-20 15:14:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034081658] [2024-06-20 15:14:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034081658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:55,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:55,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:55,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814041780] [2024-06-20 15:14:55,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:55,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:55,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:55,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 410 transitions, 7020 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:55,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:55,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:56,482 INFO L124 PetriNetUnfolderBase]: 3453/5786 cut-off events. [2024-06-20 15:14:56,482 INFO L125 PetriNetUnfolderBase]: For 492370/492370 co-relation queries the response was YES. [2024-06-20 15:14:56,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42614 conditions, 5786 events. 3453/5786 cut-off events. For 492370/492370 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38588 event pairs, 946 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 42480. Up to 5098 conditions per place. [2024-06-20 15:14:56,551 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 315 selfloop transitions, 107 changer transitions 0/429 dead transitions. [2024-06-20 15:14:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 429 transitions, 8222 flow [2024-06-20 15:14:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:14:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:14:56,553 INFO L175 Difference]: Start difference. First operand has 291 places, 410 transitions, 7020 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:14:56,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 429 transitions, 8222 flow [2024-06-20 15:14:57,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 429 transitions, 7745 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:57,826 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 6765 flow [2024-06-20 15:14:57,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6543, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6765, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-20 15:14:57,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-20 15:14:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 6765 flow [2024-06-20 15:14:57,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:57,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:14:57,827 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2047076799, now seen corresponding path program 3 times [2024-06-20 15:14:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:57,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573652249] [2024-06-20 15:14:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:57,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:57,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573652249] [2024-06-20 15:14:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573652249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:57,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241918327] [2024-06-20 15:14:57,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:57,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:57,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:57,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 6765 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:57,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:57,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:58,900 INFO L124 PetriNetUnfolderBase]: 3487/5836 cut-off events. [2024-06-20 15:14:58,900 INFO L125 PetriNetUnfolderBase]: For 516116/516116 co-relation queries the response was YES. [2024-06-20 15:14:58,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43073 conditions, 5836 events. 3487/5836 cut-off events. For 516116/516116 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38986 event pairs, 978 based on Foata normal form. 2/5828 useless extension candidates. Maximal degree in co-relation 42938. Up to 4781 conditions per place. [2024-06-20 15:14:58,973 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 225 selfloop transitions, 211 changer transitions 0/443 dead transitions. [2024-06-20 15:14:58,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 443 transitions, 8372 flow [2024-06-20 15:14:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-20 15:14:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-20 15:14:58,974 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 6765 flow. Second operand 9 states and 212 transitions. [2024-06-20 15:14:58,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 443 transitions, 8372 flow [2024-06-20 15:15:00,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 443 transitions, 8169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:00,308 INFO L231 Difference]: Finished difference. Result has 295 places, 420 transitions, 7178 flow [2024-06-20 15:15:00,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7178, PETRI_PLACES=295, PETRI_TRANSITIONS=420} [2024-06-20 15:15:00,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-20 15:15:00,308 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 420 transitions, 7178 flow [2024-06-20 15:15:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:00,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:15:00,309 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:00,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1903436221, now seen corresponding path program 4 times [2024-06-20 15:15:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:00,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454975642] [2024-06-20 15:15:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:00,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:00,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454975642] [2024-06-20 15:15:00,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454975642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:00,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:00,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:00,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384407782] [2024-06-20 15:15:00,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:00,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:00,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:00,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:00,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 420 transitions, 7178 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:00,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:00,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:01,495 INFO L124 PetriNetUnfolderBase]: 3505/5874 cut-off events. [2024-06-20 15:15:01,495 INFO L125 PetriNetUnfolderBase]: For 534021/534021 co-relation queries the response was YES. [2024-06-20 15:15:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43975 conditions, 5874 events. 3505/5874 cut-off events. For 534021/534021 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39346 event pairs, 966 based on Foata normal form. 2/5866 useless extension candidates. Maximal degree in co-relation 43838. Up to 4797 conditions per place. [2024-06-20 15:15:01,556 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 221 changer transitions 0/452 dead transitions. [2024-06-20 15:15:01,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 452 transitions, 8955 flow [2024-06-20 15:15:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:15:01,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-20 15:15:01,558 INFO L175 Difference]: Start difference. First operand has 295 places, 420 transitions, 7178 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:15:01,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 452 transitions, 8955 flow [2024-06-20 15:15:03,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 452 transitions, 8556 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:03,148 INFO L231 Difference]: Finished difference. Result has 299 places, 429 transitions, 7423 flow [2024-06-20 15:15:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6798, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7423, PETRI_PLACES=299, PETRI_TRANSITIONS=429} [2024-06-20 15:15:03,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 15:15:03,148 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 429 transitions, 7423 flow [2024-06-20 15:15:03,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:03,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:03,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:15:03,149 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1413756031, now seen corresponding path program 5 times [2024-06-20 15:15:03,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:03,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744020326] [2024-06-20 15:15:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:03,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:03,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:03,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744020326] [2024-06-20 15:15:03,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744020326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:03,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396159394] [2024-06-20 15:15:03,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:03,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:03,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 429 transitions, 7423 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:03,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:03,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:04,258 INFO L124 PetriNetUnfolderBase]: 3499/5859 cut-off events. [2024-06-20 15:15:04,259 INFO L125 PetriNetUnfolderBase]: For 541640/541640 co-relation queries the response was YES. [2024-06-20 15:15:04,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43835 conditions, 5859 events. 3499/5859 cut-off events. For 541640/541640 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39113 event pairs, 990 based on Foata normal form. 2/5851 useless extension candidates. Maximal degree in co-relation 43696. Up to 4792 conditions per place. [2024-06-20 15:15:04,335 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 218 changer transitions 0/449 dead transitions. [2024-06-20 15:15:04,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 449 transitions, 8679 flow [2024-06-20 15:15:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:15:04,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:04,336 INFO L175 Difference]: Start difference. First operand has 299 places, 429 transitions, 7423 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:15:04,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 449 transitions, 8679 flow [2024-06-20 15:15:05,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 449 transitions, 8196 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:05,849 INFO L231 Difference]: Finished difference. Result has 302 places, 429 transitions, 7383 flow [2024-06-20 15:15:05,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6940, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7383, PETRI_PLACES=302, PETRI_TRANSITIONS=429} [2024-06-20 15:15:05,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-20 15:15:05,850 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 429 transitions, 7383 flow [2024-06-20 15:15:05,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:05,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:05,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:15:05,851 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:05,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1421384263, now seen corresponding path program 1 times [2024-06-20 15:15:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:05,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854265822] [2024-06-20 15:15:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:05,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854265822] [2024-06-20 15:15:05,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854265822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:05,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:05,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734848594] [2024-06-20 15:15:05,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:05,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:05,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:05,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 429 transitions, 7383 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:05,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:05,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:07,061 INFO L124 PetriNetUnfolderBase]: 3741/6295 cut-off events. [2024-06-20 15:15:07,061 INFO L125 PetriNetUnfolderBase]: For 729048/729048 co-relation queries the response was YES. [2024-06-20 15:15:07,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47472 conditions, 6295 events. 3741/6295 cut-off events. For 729048/729048 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42784 event pairs, 1021 based on Foata normal form. 36/6321 useless extension candidates. Maximal degree in co-relation 47332. Up to 4202 conditions per place. [2024-06-20 15:15:07,137 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 220 changer transitions 0/466 dead transitions. [2024-06-20 15:15:07,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 466 transitions, 9027 flow [2024-06-20 15:15:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:15:07,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:15:07,139 INFO L175 Difference]: Start difference. First operand has 302 places, 429 transitions, 7383 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:15:07,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 466 transitions, 9027 flow [2024-06-20 15:15:08,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 466 transitions, 8577 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:08,852 INFO L231 Difference]: Finished difference. Result has 304 places, 433 transitions, 7523 flow [2024-06-20 15:15:08,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7523, PETRI_PLACES=304, PETRI_TRANSITIONS=433} [2024-06-20 15:15:08,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-20 15:15:08,853 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 433 transitions, 7523 flow [2024-06-20 15:15:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:08,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:08,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:15:08,854 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:08,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1119970537, now seen corresponding path program 7 times [2024-06-20 15:15:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943155138] [2024-06-20 15:15:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943155138] [2024-06-20 15:15:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943155138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:08,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:08,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:08,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371244346] [2024-06-20 15:15:08,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:08,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:09,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:09,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 433 transitions, 7523 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:09,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:09,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:10,121 INFO L124 PetriNetUnfolderBase]: 3873/6537 cut-off events. [2024-06-20 15:15:10,121 INFO L125 PetriNetUnfolderBase]: For 776980/776983 co-relation queries the response was YES. [2024-06-20 15:15:10,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49228 conditions, 6537 events. 3873/6537 cut-off events. For 776980/776983 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45122 event pairs, 1082 based on Foata normal form. 44/6579 useless extension candidates. Maximal degree in co-relation 49086. Up to 5473 conditions per place. [2024-06-20 15:15:10,205 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 148 changer transitions 3/471 dead transitions. [2024-06-20 15:15:10,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 471 transitions, 9127 flow [2024-06-20 15:15:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:15:10,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-20 15:15:10,206 INFO L175 Difference]: Start difference. First operand has 304 places, 433 transitions, 7523 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:15:10,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 471 transitions, 9127 flow [2024-06-20 15:15:12,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 471 transitions, 8806 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:12,055 INFO L231 Difference]: Finished difference. Result has 308 places, 434 transitions, 7564 flow [2024-06-20 15:15:12,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7202, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7564, PETRI_PLACES=308, PETRI_TRANSITIONS=434} [2024-06-20 15:15:12,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-20 15:15:12,055 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 434 transitions, 7564 flow [2024-06-20 15:15:12,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:12,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:12,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:15:12,056 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:12,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash 671016559, now seen corresponding path program 8 times [2024-06-20 15:15:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:12,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723822938] [2024-06-20 15:15:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:12,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723822938] [2024-06-20 15:15:12,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723822938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:12,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:12,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:12,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173312785] [2024-06-20 15:15:12,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:12,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:12,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 434 transitions, 7564 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:12,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:12,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,432 INFO L124 PetriNetUnfolderBase]: 4098/6932 cut-off events. [2024-06-20 15:15:13,433 INFO L125 PetriNetUnfolderBase]: For 863522/863525 co-relation queries the response was YES. [2024-06-20 15:15:13,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53149 conditions, 6932 events. 4098/6932 cut-off events. For 863522/863525 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 48383 event pairs, 1027 based on Foata normal form. 38/6968 useless extension candidates. Maximal degree in co-relation 53005. Up to 5018 conditions per place. [2024-06-20 15:15:13,529 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 158 changer transitions 4/482 dead transitions. [2024-06-20 15:15:13,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 482 transitions, 9412 flow [2024-06-20 15:15:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 15:15:13,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-06-20 15:15:13,530 INFO L175 Difference]: Start difference. First operand has 308 places, 434 transitions, 7564 flow. Second operand 8 states and 215 transitions. [2024-06-20 15:15:13,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 482 transitions, 9412 flow [2024-06-20 15:15:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 482 transitions, 9074 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:15,262 INFO L231 Difference]: Finished difference. Result has 310 places, 435 transitions, 7593 flow [2024-06-20 15:15:15,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7226, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7593, PETRI_PLACES=310, PETRI_TRANSITIONS=435} [2024-06-20 15:15:15,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-20 15:15:15,262 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 435 transitions, 7593 flow [2024-06-20 15:15:15,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:15,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:15,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:15:15,263 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:15,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1130695297, now seen corresponding path program 9 times [2024-06-20 15:15:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:15,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406022004] [2024-06-20 15:15:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406022004] [2024-06-20 15:15:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406022004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:15,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:15,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027160388] [2024-06-20 15:15:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:15,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:15,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:15,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:15,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 435 transitions, 7593 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:15,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,752 INFO L124 PetriNetUnfolderBase]: 4108/6957 cut-off events. [2024-06-20 15:15:16,752 INFO L125 PetriNetUnfolderBase]: For 847391/847394 co-relation queries the response was YES. [2024-06-20 15:15:16,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51609 conditions, 6957 events. 4108/6957 cut-off events. For 847391/847394 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48872 event pairs, 1233 based on Foata normal form. 44/6999 useless extension candidates. Maximal degree in co-relation 51464. Up to 5874 conditions per place. [2024-06-20 15:15:16,845 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 321 selfloop transitions, 133 changer transitions 3/464 dead transitions. [2024-06-20 15:15:16,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 464 transitions, 8937 flow [2024-06-20 15:15:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:15:16,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:15:16,846 INFO L175 Difference]: Start difference. First operand has 310 places, 435 transitions, 7593 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:15:16,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 464 transitions, 8937 flow [2024-06-20 15:15:18,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 464 transitions, 8386 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:18,513 INFO L231 Difference]: Finished difference. Result has 311 places, 434 transitions, 7300 flow [2024-06-20 15:15:18,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7042, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7300, PETRI_PLACES=311, PETRI_TRANSITIONS=434} [2024-06-20 15:15:18,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-20 15:15:18,513 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 434 transitions, 7300 flow [2024-06-20 15:15:18,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:18,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:18,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:15:18,514 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:18,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1655449759, now seen corresponding path program 6 times [2024-06-20 15:15:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:18,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914627479] [2024-06-20 15:15:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:18,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:18,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914627479] [2024-06-20 15:15:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914627479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:18,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:18,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697538252] [2024-06-20 15:15:18,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:18,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:18,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:18,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:18,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:18,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:18,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 434 transitions, 7300 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:18,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:18,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:19,817 INFO L124 PetriNetUnfolderBase]: 4095/6910 cut-off events. [2024-06-20 15:15:19,817 INFO L125 PetriNetUnfolderBase]: For 707232/707232 co-relation queries the response was YES. [2024-06-20 15:15:19,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50423 conditions, 6910 events. 4095/6910 cut-off events. For 707232/707232 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48390 event pairs, 1244 based on Foata normal form. 1/6904 useless extension candidates. Maximal degree in co-relation 50278. Up to 5791 conditions per place. [2024-06-20 15:15:19,909 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 241 changer transitions 0/457 dead transitions. [2024-06-20 15:15:19,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 457 transitions, 8966 flow [2024-06-20 15:15:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:15:19,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:19,911 INFO L175 Difference]: Start difference. First operand has 311 places, 434 transitions, 7300 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:15:19,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 457 transitions, 8966 flow [2024-06-20 15:15:21,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 457 transitions, 8635 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:21,578 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 7483 flow [2024-06-20 15:15:21,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6969, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7483, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-20 15:15:21,578 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:15:21,578 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 7483 flow [2024-06-20 15:15:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:21,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:21,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:21,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:15:21,579 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:21,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 359290027, now seen corresponding path program 7 times [2024-06-20 15:15:21,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855738534] [2024-06-20 15:15:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855738534] [2024-06-20 15:15:21,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855738534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:21,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:21,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879622980] [2024-06-20 15:15:21,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:21,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:21,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 7483 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:21,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:21,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:21,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:22,911 INFO L124 PetriNetUnfolderBase]: 3965/6696 cut-off events. [2024-06-20 15:15:22,911 INFO L125 PetriNetUnfolderBase]: For 615588/615588 co-relation queries the response was YES. [2024-06-20 15:15:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47391 conditions, 6696 events. 3965/6696 cut-off events. For 615588/615588 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46596 event pairs, 1186 based on Foata normal form. 1/6690 useless extension candidates. Maximal degree in co-relation 47245. Up to 5584 conditions per place. [2024-06-20 15:15:23,000 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 208 selfloop transitions, 241 changer transitions 0/456 dead transitions. [2024-06-20 15:15:23,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 456 transitions, 8953 flow [2024-06-20 15:15:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:15:23,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:15:23,001 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 7483 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:15:23,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 456 transitions, 8953 flow [2024-06-20 15:15:24,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 456 transitions, 8384 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:24,525 INFO L231 Difference]: Finished difference. Result has 315 places, 435 transitions, 7402 flow [2024-06-20 15:15:24,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7402, PETRI_PLACES=315, PETRI_TRANSITIONS=435} [2024-06-20 15:15:24,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-20 15:15:24,526 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 435 transitions, 7402 flow [2024-06-20 15:15:24,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:24,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:24,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:24,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:15:24,527 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:24,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1245253967, now seen corresponding path program 8 times [2024-06-20 15:15:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306034453] [2024-06-20 15:15:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:24,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:24,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306034453] [2024-06-20 15:15:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306034453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:24,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538339787] [2024-06-20 15:15:24,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:24,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:24,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 435 transitions, 7402 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:24,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:24,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:24,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:25,853 INFO L124 PetriNetUnfolderBase]: 3970/6708 cut-off events. [2024-06-20 15:15:25,853 INFO L125 PetriNetUnfolderBase]: For 627070/627070 co-relation queries the response was YES. [2024-06-20 15:15:25,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47535 conditions, 6708 events. 3970/6708 cut-off events. For 627070/627070 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 46775 event pairs, 1190 based on Foata normal form. 1/6702 useless extension candidates. Maximal degree in co-relation 47388. Up to 5588 conditions per place. [2024-06-20 15:15:25,932 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 254 changer transitions 0/460 dead transitions. [2024-06-20 15:15:25,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 460 transitions, 9132 flow [2024-06-20 15:15:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:15:25,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:15:25,933 INFO L175 Difference]: Start difference. First operand has 315 places, 435 transitions, 7402 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:15:25,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 460 transitions, 9132 flow [2024-06-20 15:15:27,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 8638 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:27,403 INFO L231 Difference]: Finished difference. Result has 316 places, 438 transitions, 7490 flow [2024-06-20 15:15:27,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7490, PETRI_PLACES=316, PETRI_TRANSITIONS=438} [2024-06-20 15:15:27,403 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-20 15:15:27,403 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 438 transitions, 7490 flow [2024-06-20 15:15:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:27,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:27,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:27,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:15:27,404 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:27,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash 852845263, now seen corresponding path program 7 times [2024-06-20 15:15:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486352673] [2024-06-20 15:15:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:27,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:27,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486352673] [2024-06-20 15:15:27,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486352673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:27,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:27,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171578791] [2024-06-20 15:15:27,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:27,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:27,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:27,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:27,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:27,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 438 transitions, 7490 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:27,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:27,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:27,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:28,635 INFO L124 PetriNetUnfolderBase]: 3967/6734 cut-off events. [2024-06-20 15:15:28,635 INFO L125 PetriNetUnfolderBase]: For 636828/636831 co-relation queries the response was YES. [2024-06-20 15:15:28,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47640 conditions, 6734 events. 3967/6734 cut-off events. For 636828/636831 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47100 event pairs, 1210 based on Foata normal form. 3/6728 useless extension candidates. Maximal degree in co-relation 47492. Up to 5954 conditions per place. [2024-06-20 15:15:28,726 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 345 selfloop transitions, 101 changer transitions 0/453 dead transitions. [2024-06-20 15:15:28,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 453 transitions, 8596 flow [2024-06-20 15:15:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:15:28,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:15:28,728 INFO L175 Difference]: Start difference. First operand has 316 places, 438 transitions, 7490 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:15:28,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 453 transitions, 8596 flow [2024-06-20 15:15:30,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 453 transitions, 7859 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:30,445 INFO L231 Difference]: Finished difference. Result has 315 places, 438 transitions, 6961 flow [2024-06-20 15:15:30,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6961, PETRI_PLACES=315, PETRI_TRANSITIONS=438} [2024-06-20 15:15:30,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-20 15:15:30,446 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 438 transitions, 6961 flow [2024-06-20 15:15:30,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:30,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:30,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:30,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:15:30,447 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:30,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash 356337871, now seen corresponding path program 9 times [2024-06-20 15:15:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011809330] [2024-06-20 15:15:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:30,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:30,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:30,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011809330] [2024-06-20 15:15:30,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011809330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:30,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:30,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736346855] [2024-06-20 15:15:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:30,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:30,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:30,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:30,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 438 transitions, 6961 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:30,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:30,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:30,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:31,727 INFO L124 PetriNetUnfolderBase]: 3964/6694 cut-off events. [2024-06-20 15:15:31,728 INFO L125 PetriNetUnfolderBase]: For 642154/642154 co-relation queries the response was YES. [2024-06-20 15:15:31,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46839 conditions, 6694 events. 3964/6694 cut-off events. For 642154/642154 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 46540 event pairs, 1192 based on Foata normal form. 1/6688 useless extension candidates. Maximal degree in co-relation 46691. Up to 5584 conditions per place. [2024-06-20 15:15:31,808 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 254 changer transitions 0/459 dead transitions. [2024-06-20 15:15:31,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 459 transitions, 8455 flow [2024-06-20 15:15:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:15:31,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:15:31,809 INFO L175 Difference]: Start difference. First operand has 315 places, 438 transitions, 6961 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:15:31,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 459 transitions, 8455 flow [2024-06-20 15:15:33,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 8274 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:33,489 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 7294 flow [2024-06-20 15:15:33,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7294, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-20 15:15:33,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 15:15:33,490 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 7294 flow [2024-06-20 15:15:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:33,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:33,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:33,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:15:33,491 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:33,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash -249593023, now seen corresponding path program 8 times [2024-06-20 15:15:33,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:33,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782222679] [2024-06-20 15:15:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782222679] [2024-06-20 15:15:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782222679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574233786] [2024-06-20 15:15:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:33,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:33,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 7294 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:33,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:33,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:33,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:34,737 INFO L124 PetriNetUnfolderBase]: 3966/6726 cut-off events. [2024-06-20 15:15:34,738 INFO L125 PetriNetUnfolderBase]: For 655693/655696 co-relation queries the response was YES. [2024-06-20 15:15:34,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47436 conditions, 6726 events. 3966/6726 cut-off events. For 655693/655696 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46957 event pairs, 1150 based on Foata normal form. 4/6728 useless extension candidates. Maximal degree in co-relation 47286. Up to 5973 conditions per place. [2024-06-20 15:15:34,837 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 97 changer transitions 0/467 dead transitions. [2024-06-20 15:15:34,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 467 transitions, 8540 flow [2024-06-20 15:15:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 15:15:34,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:15:34,838 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 7294 flow. Second operand 6 states and 160 transitions. [2024-06-20 15:15:34,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 467 transitions, 8540 flow [2024-06-20 15:15:36,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 467 transitions, 8016 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:36,647 INFO L231 Difference]: Finished difference. Result has 318 places, 441 transitions, 7056 flow [2024-06-20 15:15:36,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7056, PETRI_PLACES=318, PETRI_TRANSITIONS=441} [2024-06-20 15:15:36,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-20 15:15:36,648 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 441 transitions, 7056 flow [2024-06-20 15:15:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:36,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:36,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:15:36,649 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:36,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash 361070671, now seen corresponding path program 10 times [2024-06-20 15:15:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:36,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023004363] [2024-06-20 15:15:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023004363] [2024-06-20 15:15:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023004363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:36,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:36,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:36,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602977819] [2024-06-20 15:15:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:36,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:36,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 441 transitions, 7056 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:36,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:36,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:36,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:37,982 INFO L124 PetriNetUnfolderBase]: 3963/6721 cut-off events. [2024-06-20 15:15:37,982 INFO L125 PetriNetUnfolderBase]: For 658754/658754 co-relation queries the response was YES. [2024-06-20 15:15:38,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46986 conditions, 6721 events. 3963/6721 cut-off events. For 658754/658754 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 46883 event pairs, 1140 based on Foata normal form. 1/6721 useless extension candidates. Maximal degree in co-relation 46835. Up to 6193 conditions per place. [2024-06-20 15:15:38,071 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 398 selfloop transitions, 53 changer transitions 0/458 dead transitions. [2024-06-20 15:15:38,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 458 transitions, 8182 flow [2024-06-20 15:15:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 15:15:38,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 15:15:38,072 INFO L175 Difference]: Start difference. First operand has 318 places, 441 transitions, 7056 flow. Second operand 9 states and 197 transitions. [2024-06-20 15:15:38,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 458 transitions, 8182 flow [2024-06-20 15:15:40,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 458 transitions, 7952 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:40,068 INFO L231 Difference]: Finished difference. Result has 322 places, 441 transitions, 6940 flow [2024-06-20 15:15:40,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6940, PETRI_PLACES=322, PETRI_TRANSITIONS=441} [2024-06-20 15:15:40,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:15:40,068 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 441 transitions, 6940 flow [2024-06-20 15:15:40,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:40,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:15:40,069 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:40,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1543463573, now seen corresponding path program 9 times [2024-06-20 15:15:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:40,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480566238] [2024-06-20 15:15:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480566238] [2024-06-20 15:15:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480566238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:40,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:15:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110847858] [2024-06-20 15:15:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:15:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:40,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:15:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:15:40,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:40,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 441 transitions, 6940 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:40,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:40,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:41,267 INFO L124 PetriNetUnfolderBase]: 3957/6714 cut-off events. [2024-06-20 15:15:41,267 INFO L125 PetriNetUnfolderBase]: For 653584/653587 co-relation queries the response was YES. [2024-06-20 15:15:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46481 conditions, 6714 events. 3957/6714 cut-off events. For 653584/653587 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46923 event pairs, 1149 based on Foata normal form. 4/6716 useless extension candidates. Maximal degree in co-relation 46330. Up to 5963 conditions per place. [2024-06-20 15:15:41,360 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 360 selfloop transitions, 96 changer transitions 0/463 dead transitions. [2024-06-20 15:15:41,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 463 transitions, 7908 flow [2024-06-20 15:15:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:15:41,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:15:41,361 INFO L175 Difference]: Start difference. First operand has 322 places, 441 transitions, 6940 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:15:41,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 463 transitions, 7908 flow [2024-06-20 15:15:43,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 463 transitions, 7768 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:43,756 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7008 flow [2024-06-20 15:15:43,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7008, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-20 15:15:43,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-20 15:15:43,757 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7008 flow [2024-06-20 15:15:43,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:43,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:43,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:15:43,758 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:43,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash 353308891, now seen corresponding path program 11 times [2024-06-20 15:15:43,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:43,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549616177] [2024-06-20 15:15:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:43,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549616177] [2024-06-20 15:15:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549616177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:43,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954402010] [2024-06-20 15:15:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:43,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:43,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:43,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7008 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:43,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:43,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:45,042 INFO L124 PetriNetUnfolderBase]: 3954/6709 cut-off events. [2024-06-20 15:15:45,043 INFO L125 PetriNetUnfolderBase]: For 659309/659309 co-relation queries the response was YES. [2024-06-20 15:15:45,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46680 conditions, 6709 events. 3954/6709 cut-off events. For 659309/659309 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 46898 event pairs, 1140 based on Foata normal form. 1/6709 useless extension candidates. Maximal degree in co-relation 46528. Up to 6182 conditions per place. [2024-06-20 15:15:45,141 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 397 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-20 15:15:45,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 457 transitions, 7946 flow [2024-06-20 15:15:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-20 15:15:45,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-20 15:15:45,142 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7008 flow. Second operand 9 states and 196 transitions. [2024-06-20 15:15:45,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 457 transitions, 7946 flow [2024-06-20 15:15:47,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 457 transitions, 7645 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:47,319 INFO L231 Difference]: Finished difference. Result has 322 places, 441 transitions, 6819 flow [2024-06-20 15:15:47,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6707, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6819, PETRI_PLACES=322, PETRI_TRANSITIONS=441} [2024-06-20 15:15:47,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:15:47,320 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 441 transitions, 6819 flow [2024-06-20 15:15:47,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:47,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:47,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:47,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:15:47,321 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:47,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash -679316659, now seen corresponding path program 12 times [2024-06-20 15:15:47,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:47,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368724680] [2024-06-20 15:15:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:47,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:47,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368724680] [2024-06-20 15:15:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368724680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:47,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:47,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803363009] [2024-06-20 15:15:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:47,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:47,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:47,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:47,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:47,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 441 transitions, 6819 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:47,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:47,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:47,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:48,630 INFO L124 PetriNetUnfolderBase]: 3964/6728 cut-off events. [2024-06-20 15:15:48,630 INFO L125 PetriNetUnfolderBase]: For 647830/647833 co-relation queries the response was YES. [2024-06-20 15:15:48,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46301 conditions, 6728 events. 3964/6728 cut-off events. For 647830/647833 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 47108 event pairs, 1149 based on Foata normal form. 4/6730 useless extension candidates. Maximal degree in co-relation 46149. Up to 5849 conditions per place. [2024-06-20 15:15:48,714 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 142 changer transitions 0/471 dead transitions. [2024-06-20 15:15:48,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 471 transitions, 8264 flow [2024-06-20 15:15:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:15:48,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:15:48,715 INFO L175 Difference]: Start difference. First operand has 322 places, 441 transitions, 6819 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:15:48,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 471 transitions, 8264 flow [2024-06-20 15:15:51,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 471 transitions, 8136 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:51,077 INFO L231 Difference]: Finished difference. Result has 322 places, 445 transitions, 7069 flow [2024-06-20 15:15:51,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7069, PETRI_PLACES=322, PETRI_TRANSITIONS=445} [2024-06-20 15:15:51,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:15:51,078 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 445 transitions, 7069 flow [2024-06-20 15:15:51,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:51,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:51,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:15:51,078 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:51,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash 317440363, now seen corresponding path program 13 times [2024-06-20 15:15:51,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:51,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732536998] [2024-06-20 15:15:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:51,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732536998] [2024-06-20 15:15:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732536998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:51,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:51,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008462395] [2024-06-20 15:15:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:51,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:51,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 445 transitions, 7069 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:51,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:51,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:52,348 INFO L124 PetriNetUnfolderBase]: 3969/6736 cut-off events. [2024-06-20 15:15:52,348 INFO L125 PetriNetUnfolderBase]: For 658204/658204 co-relation queries the response was YES. [2024-06-20 15:15:52,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46869 conditions, 6736 events. 3969/6736 cut-off events. For 658204/658204 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47117 event pairs, 1140 based on Foata normal form. 1/6736 useless extension candidates. Maximal degree in co-relation 46716. Up to 5853 conditions per place. [2024-06-20 15:15:52,440 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 315 selfloop transitions, 157 changer transitions 0/479 dead transitions. [2024-06-20 15:15:52,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 479 transitions, 8718 flow [2024-06-20 15:15:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:15:52,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-20 15:15:52,441 INFO L175 Difference]: Start difference. First operand has 322 places, 445 transitions, 7069 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:15:52,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 479 transitions, 8718 flow [2024-06-20 15:15:54,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 8394 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:54,864 INFO L231 Difference]: Finished difference. Result has 325 places, 448 transitions, 7140 flow [2024-06-20 15:15:54,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7140, PETRI_PLACES=325, PETRI_TRANSITIONS=448} [2024-06-20 15:15:54,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-20 15:15:54,865 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 448 transitions, 7140 flow [2024-06-20 15:15:54,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:54,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:15:54,866 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:54,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1130818429, now seen corresponding path program 14 times [2024-06-20 15:15:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204198292] [2024-06-20 15:15:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:54,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204198292] [2024-06-20 15:15:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204198292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:54,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:54,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857883813] [2024-06-20 15:15:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:54,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:54,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 448 transitions, 7140 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:54,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:54,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:56,121 INFO L124 PetriNetUnfolderBase]: 3971/6742 cut-off events. [2024-06-20 15:15:56,121 INFO L125 PetriNetUnfolderBase]: For 671903/671906 co-relation queries the response was YES. [2024-06-20 15:15:56,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46951 conditions, 6742 events. 3971/6742 cut-off events. For 671903/671906 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47176 event pairs, 1149 based on Foata normal form. 4/6744 useless extension candidates. Maximal degree in co-relation 46797. Up to 5857 conditions per place. [2024-06-20 15:15:56,211 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 328 selfloop transitions, 141 changer transitions 0/476 dead transitions. [2024-06-20 15:15:56,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 476 transitions, 8773 flow [2024-06-20 15:15:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-20 15:15:56,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-20 15:15:56,212 INFO L175 Difference]: Start difference. First operand has 325 places, 448 transitions, 7140 flow. Second operand 9 states and 213 transitions. [2024-06-20 15:15:56,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 476 transitions, 8773 flow [2024-06-20 15:15:58,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 476 transitions, 8478 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:58,856 INFO L231 Difference]: Finished difference. Result has 327 places, 451 transitions, 7211 flow [2024-06-20 15:15:58,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6857, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7211, PETRI_PLACES=327, PETRI_TRANSITIONS=451} [2024-06-20 15:15:58,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-20 15:15:58,857 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 451 transitions, 7211 flow [2024-06-20 15:15:58,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:58,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:58,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:58,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:15:58,857 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:58,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1967628913, now seen corresponding path program 15 times [2024-06-20 15:15:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:58,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97477593] [2024-06-20 15:15:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97477593] [2024-06-20 15:15:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97477593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:58,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029129016] [2024-06-20 15:15:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:58,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:58,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:58,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:58,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 451 transitions, 7211 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:58,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:58,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:58,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:00,192 INFO L124 PetriNetUnfolderBase]: 3968/6737 cut-off events. [2024-06-20 15:16:00,193 INFO L125 PetriNetUnfolderBase]: For 663509/663509 co-relation queries the response was YES. [2024-06-20 15:16:00,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46778 conditions, 6737 events. 3968/6737 cut-off events. For 663509/663509 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47143 event pairs, 1140 based on Foata normal form. 1/6737 useless extension candidates. Maximal degree in co-relation 46624. Up to 5855 conditions per place. [2024-06-20 15:16:00,300 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 165 changer transitions 0/480 dead transitions. [2024-06-20 15:16:00,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 480 transitions, 8417 flow [2024-06-20 15:16:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:16:00,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-20 15:16:00,301 INFO L175 Difference]: Start difference. First operand has 327 places, 451 transitions, 7211 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:16:00,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 480 transitions, 8417 flow [2024-06-20 15:16:03,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 480 transitions, 8033 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:03,386 INFO L231 Difference]: Finished difference. Result has 329 places, 451 transitions, 7167 flow [2024-06-20 15:16:03,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7167, PETRI_PLACES=329, PETRI_TRANSITIONS=451} [2024-06-20 15:16:03,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-20 15:16:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 451 transitions, 7167 flow [2024-06-20 15:16:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:03,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:03,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:16:03,387 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash 630609733, now seen corresponding path program 2 times [2024-06-20 15:16:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951753248] [2024-06-20 15:16:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951753248] [2024-06-20 15:16:03,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951753248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:03,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:03,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:03,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313035102] [2024-06-20 15:16:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:03,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:03,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:03,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 451 transitions, 7167 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:03,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:03,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:04,713 INFO L124 PetriNetUnfolderBase]: 4263/7251 cut-off events. [2024-06-20 15:16:04,714 INFO L125 PetriNetUnfolderBase]: For 958651/958654 co-relation queries the response was YES. [2024-06-20 15:16:04,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51887 conditions, 7251 events. 4263/7251 cut-off events. For 958651/958654 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 51419 event pairs, 980 based on Foata normal form. 44/7293 useless extension candidates. Maximal degree in co-relation 51732. Up to 5547 conditions per place. [2024-06-20 15:16:04,805 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 110 changer transitions 0/496 dead transitions. [2024-06-20 15:16:04,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 496 transitions, 8613 flow [2024-06-20 15:16:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-20 15:16:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-20 15:16:04,806 INFO L175 Difference]: Start difference. First operand has 329 places, 451 transitions, 7167 flow. Second operand 7 states and 190 transitions. [2024-06-20 15:16:04,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 496 transitions, 8613 flow [2024-06-20 15:16:07,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 496 transitions, 8159 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 15:16:07,710 INFO L231 Difference]: Finished difference. Result has 327 places, 457 transitions, 7128 flow [2024-06-20 15:16:07,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7128, PETRI_PLACES=327, PETRI_TRANSITIONS=457} [2024-06-20 15:16:07,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-20 15:16:07,710 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 457 transitions, 7128 flow [2024-06-20 15:16:07,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:07,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:16:07,711 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1073438533, now seen corresponding path program 3 times [2024-06-20 15:16:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647322954] [2024-06-20 15:16:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647322954] [2024-06-20 15:16:07,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647322954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:07,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520077115] [2024-06-20 15:16:07,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:07,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:07,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:07,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 457 transitions, 7128 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:07,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:09,272 INFO L124 PetriNetUnfolderBase]: 4771/8135 cut-off events. [2024-06-20 15:16:09,273 INFO L125 PetriNetUnfolderBase]: For 1218145/1218148 co-relation queries the response was YES. [2024-06-20 15:16:09,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62221 conditions, 8135 events. 4771/8135 cut-off events. For 1218145/1218148 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58924 event pairs, 1118 based on Foata normal form. 44/8177 useless extension candidates. Maximal degree in co-relation 62066. Up to 4357 conditions per place. [2024-06-20 15:16:09,376 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 388 selfloop transitions, 114 changer transitions 0/509 dead transitions. [2024-06-20 15:16:09,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 509 transitions, 8888 flow [2024-06-20 15:16:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 15:16:09,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6892857142857143 [2024-06-20 15:16:09,377 INFO L175 Difference]: Start difference. First operand has 327 places, 457 transitions, 7128 flow. Second operand 7 states and 193 transitions. [2024-06-20 15:16:09,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 509 transitions, 8888 flow [2024-06-20 15:16:13,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 509 transitions, 8684 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:13,151 INFO L231 Difference]: Finished difference. Result has 332 places, 465 transitions, 7449 flow [2024-06-20 15:16:13,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6932, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7449, PETRI_PLACES=332, PETRI_TRANSITIONS=465} [2024-06-20 15:16:13,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-20 15:16:13,151 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 465 transitions, 7449 flow [2024-06-20 15:16:13,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:13,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:13,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:13,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:16:13,152 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:13,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1131095011, now seen corresponding path program 4 times [2024-06-20 15:16:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:13,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928893464] [2024-06-20 15:16:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:13,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928893464] [2024-06-20 15:16:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928893464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:13,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:13,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166428687] [2024-06-20 15:16:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:13,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:13,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:13,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 465 transitions, 7449 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:13,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:13,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:14,934 INFO L124 PetriNetUnfolderBase]: 4954/8486 cut-off events. [2024-06-20 15:16:14,935 INFO L125 PetriNetUnfolderBase]: For 1242462/1242465 co-relation queries the response was YES. [2024-06-20 15:16:15,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65283 conditions, 8486 events. 4954/8486 cut-off events. For 1242462/1242465 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 62738 event pairs, 1568 based on Foata normal form. 38/8522 useless extension candidates. Maximal degree in co-relation 65125. Up to 6677 conditions per place. [2024-06-20 15:16:15,037 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 354 selfloop transitions, 143 changer transitions 0/504 dead transitions. [2024-06-20 15:16:15,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 504 transitions, 9225 flow [2024-06-20 15:16:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:16:15,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-20 15:16:15,038 INFO L175 Difference]: Start difference. First operand has 332 places, 465 transitions, 7449 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:16:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 504 transitions, 9225 flow [2024-06-20 15:16:18,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 504 transitions, 9033 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:18,476 INFO L231 Difference]: Finished difference. Result has 338 places, 468 transitions, 7670 flow [2024-06-20 15:16:18,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7267, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7670, PETRI_PLACES=338, PETRI_TRANSITIONS=468} [2024-06-20 15:16:18,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-20 15:16:18,477 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 468 transitions, 7670 flow [2024-06-20 15:16:18,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:18,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:18,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:18,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:16:18,478 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:18,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash 267633169, now seen corresponding path program 1 times [2024-06-20 15:16:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921916697] [2024-06-20 15:16:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:18,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:18,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921916697] [2024-06-20 15:16:18,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921916697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:18,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:18,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922430324] [2024-06-20 15:16:18,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:18,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:18,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:18,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 468 transitions, 7670 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:18,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:18,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:18,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:20,225 INFO L124 PetriNetUnfolderBase]: 5235/8958 cut-off events. [2024-06-20 15:16:20,225 INFO L125 PetriNetUnfolderBase]: For 1406608/1406608 co-relation queries the response was YES. [2024-06-20 15:16:20,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70530 conditions, 8958 events. 5235/8958 cut-off events. For 1406608/1406608 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 67246 event pairs, 1657 based on Foata normal form. 36/8987 useless extension candidates. Maximal degree in co-relation 70370. Up to 6372 conditions per place. [2024-06-20 15:16:20,548 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 285 changer transitions 7/510 dead transitions. [2024-06-20 15:16:20,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 510 transitions, 9292 flow [2024-06-20 15:16:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:16:20,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-20 15:16:20,550 INFO L175 Difference]: Start difference. First operand has 338 places, 468 transitions, 7670 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:16:20,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 510 transitions, 9292 flow [2024-06-20 15:16:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 510 transitions, 9044 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:25,543 INFO L231 Difference]: Finished difference. Result has 342 places, 470 transitions, 8053 flow [2024-06-20 15:16:25,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8053, PETRI_PLACES=342, PETRI_TRANSITIONS=470} [2024-06-20 15:16:25,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-20 15:16:25,544 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 470 transitions, 8053 flow [2024-06-20 15:16:25,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:25,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:25,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:25,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:16:25,544 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:25,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash -814893757, now seen corresponding path program 2 times [2024-06-20 15:16:25,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:25,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133770417] [2024-06-20 15:16:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:25,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:25,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:25,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133770417] [2024-06-20 15:16:25,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133770417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:25,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:25,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:25,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364448573] [2024-06-20 15:16:25,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:25,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:25,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:25,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:25,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:25,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 470 transitions, 8053 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:25,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:25,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:25,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:27,383 INFO L124 PetriNetUnfolderBase]: 5512/9405 cut-off events. [2024-06-20 15:16:27,383 INFO L125 PetriNetUnfolderBase]: For 1627945/1627945 co-relation queries the response was YES. [2024-06-20 15:16:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77363 conditions, 9405 events. 5512/9405 cut-off events. For 1627945/1627945 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 70961 event pairs, 1983 based on Foata normal form. 36/9434 useless extension candidates. Maximal degree in co-relation 77201. Up to 7574 conditions per place. [2024-06-20 15:16:27,517 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 271 changer transitions 4/506 dead transitions. [2024-06-20 15:16:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 506 transitions, 9671 flow [2024-06-20 15:16:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:16:27,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:16:27,518 INFO L175 Difference]: Start difference. First operand has 342 places, 470 transitions, 8053 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:16:27,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 506 transitions, 9671 flow [2024-06-20 15:16:31,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 506 transitions, 8898 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:31,801 INFO L231 Difference]: Finished difference. Result has 344 places, 473 transitions, 7934 flow [2024-06-20 15:16:31,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7934, PETRI_PLACES=344, PETRI_TRANSITIONS=473} [2024-06-20 15:16:31,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-20 15:16:31,802 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 473 transitions, 7934 flow [2024-06-20 15:16:31,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:31,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:31,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:16:31,803 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:31,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1244829329, now seen corresponding path program 3 times [2024-06-20 15:16:31,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:31,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410686728] [2024-06-20 15:16:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:31,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410686728] [2024-06-20 15:16:31,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410686728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:31,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:31,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317680361] [2024-06-20 15:16:31,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:31,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:31,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:31,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:31,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 473 transitions, 7934 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:31,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:31,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:31,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:33,596 INFO L124 PetriNetUnfolderBase]: 5395/9230 cut-off events. [2024-06-20 15:16:33,596 INFO L125 PetriNetUnfolderBase]: For 1488440/1488440 co-relation queries the response was YES. [2024-06-20 15:16:33,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71880 conditions, 9230 events. 5395/9230 cut-off events. For 1488440/1488440 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 69637 event pairs, 1982 based on Foata normal form. 42/9265 useless extension candidates. Maximal degree in co-relation 71718. Up to 7736 conditions per place. [2024-06-20 15:16:33,731 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 266 changer transitions 3/498 dead transitions. [2024-06-20 15:16:33,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 498 transitions, 9188 flow [2024-06-20 15:16:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:16:33,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:16:33,732 INFO L175 Difference]: Start difference. First operand has 344 places, 473 transitions, 7934 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:16:33,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 498 transitions, 9188 flow [2024-06-20 15:16:38,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 498 transitions, 8767 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:16:38,445 INFO L231 Difference]: Finished difference. Result has 348 places, 472 transitions, 8039 flow [2024-06-20 15:16:38,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7513, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8039, PETRI_PLACES=348, PETRI_TRANSITIONS=472} [2024-06-20 15:16:38,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-20 15:16:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 472 transitions, 8039 flow [2024-06-20 15:16:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:38,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:38,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:16:38,446 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1535686913, now seen corresponding path program 4 times [2024-06-20 15:16:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917340464] [2024-06-20 15:16:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:38,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917340464] [2024-06-20 15:16:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917340464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:38,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:38,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:38,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655063988] [2024-06-20 15:16:38,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:38,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:38,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:38,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:38,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 472 transitions, 8039 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:38,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:38,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:38,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:40,548 INFO L124 PetriNetUnfolderBase]: 5441/9340 cut-off events. [2024-06-20 15:16:40,548 INFO L125 PetriNetUnfolderBase]: For 1393217/1393217 co-relation queries the response was YES. [2024-06-20 15:16:40,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72949 conditions, 9340 events. 5441/9340 cut-off events. For 1393217/1393217 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 70829 event pairs, 1907 based on Foata normal form. 16/9355 useless extension candidates. Maximal degree in co-relation 72785. Up to 8551 conditions per place. [2024-06-20 15:16:40,668 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 55 changer transitions 0/494 dead transitions. [2024-06-20 15:16:40,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 494 transitions, 9125 flow [2024-06-20 15:16:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 15:16:40,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 15:16:40,669 INFO L175 Difference]: Start difference. First operand has 348 places, 472 transitions, 8039 flow. Second operand 9 states and 199 transitions. [2024-06-20 15:16:40,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 494 transitions, 9125 flow [2024-06-20 15:16:45,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 494 transitions, 8585 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:45,148 INFO L231 Difference]: Finished difference. Result has 350 places, 474 transitions, 7669 flow [2024-06-20 15:16:45,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7499, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7669, PETRI_PLACES=350, PETRI_TRANSITIONS=474} [2024-06-20 15:16:45,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-20 15:16:45,149 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 474 transitions, 7669 flow [2024-06-20 15:16:45,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:45,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:16:45,150 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:45,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1965918225, now seen corresponding path program 5 times [2024-06-20 15:16:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581945583] [2024-06-20 15:16:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:45,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:45,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581945583] [2024-06-20 15:16:45,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581945583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:45,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:45,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:45,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991222234] [2024-06-20 15:16:45,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:45,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:45,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:45,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:45,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:45,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:45,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 474 transitions, 7669 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:45,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:45,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:47,430 INFO L124 PetriNetUnfolderBase]: 5527/9474 cut-off events. [2024-06-20 15:16:47,430 INFO L125 PetriNetUnfolderBase]: For 1444494/1444494 co-relation queries the response was YES. [2024-06-20 15:16:47,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74344 conditions, 9474 events. 5527/9474 cut-off events. For 1444494/1444494 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 71879 event pairs, 1899 based on Foata normal form. 12/9485 useless extension candidates. Maximal degree in co-relation 74179. Up to 8511 conditions per place. [2024-06-20 15:16:47,553 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 62 changer transitions 0/501 dead transitions. [2024-06-20 15:16:47,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 501 transitions, 9017 flow [2024-06-20 15:16:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 15:16:47,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-20 15:16:47,554 INFO L175 Difference]: Start difference. First operand has 350 places, 474 transitions, 7669 flow. Second operand 9 states and 202 transitions. [2024-06-20 15:16:47,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 501 transitions, 9017 flow [2024-06-20 15:16:53,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 501 transitions, 8877 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:53,201 INFO L231 Difference]: Finished difference. Result has 352 places, 477 transitions, 7746 flow [2024-06-20 15:16:53,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7529, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7746, PETRI_PLACES=352, PETRI_TRANSITIONS=477} [2024-06-20 15:16:53,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-20 15:16:53,205 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 477 transitions, 7746 flow [2024-06-20 15:16:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:53,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:53,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:16:53,205 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:53,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1960192773, now seen corresponding path program 1 times [2024-06-20 15:16:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:53,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739875469] [2024-06-20 15:16:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:53,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739875469] [2024-06-20 15:16:53,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739875469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:53,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:53,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:53,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28700795] [2024-06-20 15:16:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:53,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:53,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:53,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:53,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 477 transitions, 7746 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:53,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:53,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:53,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:55,605 INFO L124 PetriNetUnfolderBase]: 5692/9699 cut-off events. [2024-06-20 15:16:55,606 INFO L125 PetriNetUnfolderBase]: For 1572529/1572529 co-relation queries the response was YES. [2024-06-20 15:16:55,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78384 conditions, 9699 events. 5692/9699 cut-off events. For 1572529/1572529 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 73406 event pairs, 1933 based on Foata normal form. 12/9710 useless extension candidates. Maximal degree in co-relation 78218. Up to 8757 conditions per place. [2024-06-20 15:16:55,730 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 39 changer transitions 0/507 dead transitions. [2024-06-20 15:16:55,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 507 transitions, 9175 flow [2024-06-20 15:16:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 15:16:55,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 15:16:55,731 INFO L175 Difference]: Start difference. First operand has 352 places, 477 transitions, 7746 flow. Second operand 9 states and 199 transitions. [2024-06-20 15:16:55,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 507 transitions, 9175 flow [2024-06-20 15:17:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 507 transitions, 9069 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:01,737 INFO L231 Difference]: Finished difference. Result has 357 places, 483 transitions, 7904 flow [2024-06-20 15:17:01,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7640, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7904, PETRI_PLACES=357, PETRI_TRANSITIONS=483} [2024-06-20 15:17:01,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-20 15:17:01,738 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 483 transitions, 7904 flow [2024-06-20 15:17:01,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:01,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:01,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:01,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:17:01,739 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:01,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1967619985, now seen corresponding path program 6 times [2024-06-20 15:17:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:01,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500922649] [2024-06-20 15:17:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500922649] [2024-06-20 15:17:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500922649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:01,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385532820] [2024-06-20 15:17:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:01,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:01,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:01,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 483 transitions, 7904 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:01,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:01,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:01,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:04,152 INFO L124 PetriNetUnfolderBase]: 5811/9940 cut-off events. [2024-06-20 15:17:04,152 INFO L125 PetriNetUnfolderBase]: For 1745912/1745912 co-relation queries the response was YES. [2024-06-20 15:17:04,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79744 conditions, 9940 events. 5811/9940 cut-off events. For 1745912/1745912 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 75975 event pairs, 2027 based on Foata normal form. 42/9981 useless extension candidates. Maximal degree in co-relation 79575. Up to 8592 conditions per place. [2024-06-20 15:17:04,283 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 343 selfloop transitions, 167 changer transitions 3/520 dead transitions. [2024-06-20 15:17:04,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 520 transitions, 9294 flow [2024-06-20 15:17:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 15:17:04,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-06-20 15:17:04,284 INFO L175 Difference]: Start difference. First operand has 357 places, 483 transitions, 7904 flow. Second operand 9 states and 223 transitions. [2024-06-20 15:17:04,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 520 transitions, 9294 flow [2024-06-20 15:17:09,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 520 transitions, 9185 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:17:09,435 INFO L231 Difference]: Finished difference. Result has 362 places, 484 transitions, 8184 flow [2024-06-20 15:17:09,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8184, PETRI_PLACES=362, PETRI_TRANSITIONS=484} [2024-06-20 15:17:09,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-20 15:17:09,435 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 484 transitions, 8184 flow [2024-06-20 15:17:09,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:09,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:09,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:09,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:17:09,436 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:09,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1967767855, now seen corresponding path program 7 times [2024-06-20 15:17:09,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:09,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98016835] [2024-06-20 15:17:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:09,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:09,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98016835] [2024-06-20 15:17:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98016835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:09,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:09,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:09,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989882141] [2024-06-20 15:17:09,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:09,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:09,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:09,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:09,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:09,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:09,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 484 transitions, 8184 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:09,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:09,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:09,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:12,010 INFO L124 PetriNetUnfolderBase]: 6049/10354 cut-off events. [2024-06-20 15:17:12,011 INFO L125 PetriNetUnfolderBase]: For 1894820/1894820 co-relation queries the response was YES. [2024-06-20 15:17:12,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84722 conditions, 10354 events. 6049/10354 cut-off events. For 1894820/1894820 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 79817 event pairs, 1903 based on Foata normal form. 36/10389 useless extension candidates. Maximal degree in co-relation 84552. Up to 8039 conditions per place. [2024-06-20 15:17:12,144 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 337 selfloop transitions, 183 changer transitions 4/531 dead transitions. [2024-06-20 15:17:12,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 531 transitions, 9854 flow [2024-06-20 15:17:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:17:12,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-20 15:17:12,145 INFO L175 Difference]: Start difference. First operand has 362 places, 484 transitions, 8184 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:17:12,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 531 transitions, 9854 flow [2024-06-20 15:17:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 531 transitions, 9566 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:20,245 INFO L231 Difference]: Finished difference. Result has 365 places, 485 transitions, 8305 flow [2024-06-20 15:17:20,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8305, PETRI_PLACES=365, PETRI_TRANSITIONS=485} [2024-06-20 15:17:20,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-20 15:17:20,246 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 485 transitions, 8305 flow [2024-06-20 15:17:20,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:20,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:20,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:20,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:17:20,246 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:20,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash 807925951, now seen corresponding path program 2 times [2024-06-20 15:17:20,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:20,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976022031] [2024-06-20 15:17:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:20,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:20,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:20,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976022031] [2024-06-20 15:17:20,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976022031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:20,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:20,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:20,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804498801] [2024-06-20 15:17:20,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:20,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:20,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:20,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:20,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 485 transitions, 8305 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:20,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:20,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:20,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:22,849 INFO L124 PetriNetUnfolderBase]: 6301/10772 cut-off events. [2024-06-20 15:17:22,850 INFO L125 PetriNetUnfolderBase]: For 2069176/2069176 co-relation queries the response was YES. [2024-06-20 15:17:23,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89784 conditions, 10772 events. 6301/10772 cut-off events. For 2069176/2069176 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 83555 event pairs, 1864 based on Foata normal form. 42/10809 useless extension candidates. Maximal degree in co-relation 89613. Up to 8516 conditions per place. [2024-06-20 15:17:23,152 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 401 selfloop transitions, 128 changer transitions 0/536 dead transitions. [2024-06-20 15:17:23,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 536 transitions, 9907 flow [2024-06-20 15:17:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:17:23,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-20 15:17:23,153 INFO L175 Difference]: Start difference. First operand has 365 places, 485 transitions, 8305 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:17:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 536 transitions, 9907 flow [2024-06-20 15:17:30,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 536 transitions, 9548 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:30,795 INFO L231 Difference]: Finished difference. Result has 368 places, 493 transitions, 8480 flow [2024-06-20 15:17:30,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8480, PETRI_PLACES=368, PETRI_TRANSITIONS=493} [2024-06-20 15:17:30,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-20 15:17:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 493 transitions, 8480 flow [2024-06-20 15:17:30,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:30,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:30,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:17:30,796 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:30,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1073623231, now seen corresponding path program 3 times [2024-06-20 15:17:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:30,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347142302] [2024-06-20 15:17:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:30,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:30,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347142302] [2024-06-20 15:17:30,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347142302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:30,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:30,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:30,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618908618] [2024-06-20 15:17:30,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:30,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:30,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:30,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:30,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:30,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:30,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 493 transitions, 8480 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:30,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:30,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:30,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:33,510 INFO L124 PetriNetUnfolderBase]: 6399/10993 cut-off events. [2024-06-20 15:17:33,510 INFO L125 PetriNetUnfolderBase]: For 1995402/1995405 co-relation queries the response was YES. [2024-06-20 15:17:33,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89786 conditions, 10993 events. 6399/10993 cut-off events. For 1995402/1995405 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 85340 event pairs, 1819 based on Foata normal form. 44/11035 useless extension candidates. Maximal degree in co-relation 89613. Up to 6224 conditions per place. [2024-06-20 15:17:33,661 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 114 changer transitions 0/538 dead transitions. [2024-06-20 15:17:33,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 538 transitions, 10172 flow [2024-06-20 15:17:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 15:17:33,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6892857142857143 [2024-06-20 15:17:33,662 INFO L175 Difference]: Start difference. First operand has 368 places, 493 transitions, 8480 flow. Second operand 7 states and 193 transitions. [2024-06-20 15:17:33,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 538 transitions, 10172 flow [2024-06-20 15:17:40,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 538 transitions, 9896 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:40,210 INFO L231 Difference]: Finished difference. Result has 369 places, 495 transitions, 8510 flow [2024-06-20 15:17:40,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8214, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8510, PETRI_PLACES=369, PETRI_TRANSITIONS=495} [2024-06-20 15:17:40,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:17:40,210 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 495 transitions, 8510 flow [2024-06-20 15:17:40,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:40,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:40,211 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] [2024-06-20 15:17:40,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:17:40,211 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:40,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1969236474, now seen corresponding path program 1 times [2024-06-20 15:17:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468354753] [2024-06-20 15:17:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:40,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:40,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468354753] [2024-06-20 15:17:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468354753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:40,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:40,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:40,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970163919] [2024-06-20 15:17:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:40,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:40,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:40,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 495 transitions, 8510 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:40,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:40,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:40,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:42,811 INFO L124 PetriNetUnfolderBase]: 6466/11071 cut-off events. [2024-06-20 15:17:42,812 INFO L125 PetriNetUnfolderBase]: For 1818795/1818795 co-relation queries the response was YES. [2024-06-20 15:17:42,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90700 conditions, 11071 events. 6466/11071 cut-off events. For 1818795/1818795 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 86168 event pairs, 2143 based on Foata normal form. 2/11060 useless extension candidates. Maximal degree in co-relation 90527. Up to 9435 conditions per place. [2024-06-20 15:17:42,971 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 125 changer transitions 0/536 dead transitions. [2024-06-20 15:17:42,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 536 transitions, 10307 flow [2024-06-20 15:17:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:17:42,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:17:42,972 INFO L175 Difference]: Start difference. First operand has 369 places, 495 transitions, 8510 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:17:42,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 536 transitions, 10307 flow [2024-06-20 15:17:49,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 536 transitions, 10037 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:49,006 INFO L231 Difference]: Finished difference. Result has 373 places, 503 transitions, 8732 flow [2024-06-20 15:17:49,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8732, PETRI_PLACES=373, PETRI_TRANSITIONS=503} [2024-06-20 15:17:49,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 15:17:49,007 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 503 transitions, 8732 flow [2024-06-20 15:17:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:49,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:49,007 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] [2024-06-20 15:17:49,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:17:49,007 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:49,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 290755956, now seen corresponding path program 2 times [2024-06-20 15:17:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246492887] [2024-06-20 15:17:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:49,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:49,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246492887] [2024-06-20 15:17:49,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246492887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:49,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727331379] [2024-06-20 15:17:49,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:49,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:49,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:49,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 503 transitions, 8732 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:49,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:51,612 INFO L124 PetriNetUnfolderBase]: 6533/11180 cut-off events. [2024-06-20 15:17:51,612 INFO L125 PetriNetUnfolderBase]: For 1870413/1870413 co-relation queries the response was YES. [2024-06-20 15:17:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91992 conditions, 11180 events. 6533/11180 cut-off events. For 1870413/1870413 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 87094 event pairs, 2120 based on Foata normal form. 2/11169 useless extension candidates. Maximal degree in co-relation 91818. Up to 9479 conditions per place. [2024-06-20 15:17:51,756 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 129 changer transitions 1/541 dead transitions. [2024-06-20 15:17:51,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 541 transitions, 10505 flow [2024-06-20 15:17:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:17:51,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:17:51,758 INFO L175 Difference]: Start difference. First operand has 373 places, 503 transitions, 8732 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:17:51,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 541 transitions, 10505 flow [2024-06-20 15:17:59,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 541 transitions, 10294 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-20 15:17:59,265 INFO L231 Difference]: Finished difference. Result has 378 places, 507 transitions, 8876 flow [2024-06-20 15:17:59,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8547, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8876, PETRI_PLACES=378, PETRI_TRANSITIONS=507} [2024-06-20 15:17:59,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-20 15:17:59,265 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 507 transitions, 8876 flow [2024-06-20 15:17:59,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:59,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:59,266 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] [2024-06-20 15:17:59,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:17:59,266 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:59,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2027328924, now seen corresponding path program 3 times [2024-06-20 15:17:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:59,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082775537] [2024-06-20 15:17:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:59,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082775537] [2024-06-20 15:17:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082775537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:59,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:59,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:17:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589626330] [2024-06-20 15:17:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:17:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:17:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:17:59,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:59,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 507 transitions, 8876 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:59,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:59,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:59,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:01,944 INFO L124 PetriNetUnfolderBase]: 6528/11195 cut-off events. [2024-06-20 15:18:01,945 INFO L125 PetriNetUnfolderBase]: For 1897125/1897125 co-relation queries the response was YES. [2024-06-20 15:18:02,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92492 conditions, 11195 events. 6528/11195 cut-off events. For 1897125/1897125 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 87821 event pairs, 2448 based on Foata normal form. 2/11179 useless extension candidates. Maximal degree in co-relation 92316. Up to 10095 conditions per place. [2024-06-20 15:18:02,116 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 115 changer transitions 0/536 dead transitions. [2024-06-20 15:18:02,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 536 transitions, 10252 flow [2024-06-20 15:18:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:18:02,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:18:02,118 INFO L175 Difference]: Start difference. First operand has 378 places, 507 transitions, 8876 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:18:02,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 536 transitions, 10252 flow [2024-06-20 15:18:09,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 536 transitions, 10025 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:18:09,281 INFO L231 Difference]: Finished difference. Result has 383 places, 510 transitions, 8950 flow [2024-06-20 15:18:09,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8654, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8950, PETRI_PLACES=383, PETRI_TRANSITIONS=510} [2024-06-20 15:18:09,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-20 15:18:09,281 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 510 transitions, 8950 flow [2024-06-20 15:18:09,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:09,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:09,282 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] [2024-06-20 15:18:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:18:09,282 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:09,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash 428378618, now seen corresponding path program 4 times [2024-06-20 15:18:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224000346] [2024-06-20 15:18:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:09,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:09,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224000346] [2024-06-20 15:18:09,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224000346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:09,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:09,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210437899] [2024-06-20 15:18:09,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:09,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:09,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:09,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:09,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:09,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:09,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 510 transitions, 8950 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:09,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:09,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:09,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:11,995 INFO L124 PetriNetUnfolderBase]: 6536/11215 cut-off events. [2024-06-20 15:18:11,996 INFO L125 PetriNetUnfolderBase]: For 1933254/1933254 co-relation queries the response was YES. [2024-06-20 15:18:12,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92856 conditions, 11215 events. 6536/11215 cut-off events. For 1933254/1933254 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 88113 event pairs, 2458 based on Foata normal form. 2/11207 useless extension candidates. Maximal degree in co-relation 92678. Up to 10147 conditions per place. [2024-06-20 15:18:12,142 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 110 changer transitions 0/533 dead transitions. [2024-06-20 15:18:12,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 533 transitions, 10104 flow [2024-06-20 15:18:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:18:12,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:18:12,143 INFO L175 Difference]: Start difference. First operand has 383 places, 510 transitions, 8950 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:18:12,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 533 transitions, 10104 flow [2024-06-20 15:18:19,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 533 transitions, 9813 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 15:18:19,385 INFO L231 Difference]: Finished difference. Result has 386 places, 512 transitions, 8938 flow [2024-06-20 15:18:19,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8679, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8938, PETRI_PLACES=386, PETRI_TRANSITIONS=512} [2024-06-20 15:18:19,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-20 15:18:19,385 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 512 transitions, 8938 flow [2024-06-20 15:18:19,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:19,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:19,386 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] [2024-06-20 15:18:19,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:18:19,388 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:19,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1621691932, now seen corresponding path program 5 times [2024-06-20 15:18:19,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:19,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996484216] [2024-06-20 15:18:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:19,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996484216] [2024-06-20 15:18:19,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996484216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:19,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:19,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:19,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447867805] [2024-06-20 15:18:19,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:19,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:19,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 512 transitions, 8938 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:19,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:19,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:19,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:22,253 INFO L124 PetriNetUnfolderBase]: 6531/11208 cut-off events. [2024-06-20 15:18:22,254 INFO L125 PetriNetUnfolderBase]: For 1957440/1957440 co-relation queries the response was YES. [2024-06-20 15:18:22,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92775 conditions, 11208 events. 6531/11208 cut-off events. For 1957440/1957440 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 88021 event pairs, 2457 based on Foata normal form. 2/11200 useless extension candidates. Maximal degree in co-relation 92596. Up to 10140 conditions per place. [2024-06-20 15:18:22,428 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 417 selfloop transitions, 106 changer transitions 0/530 dead transitions. [2024-06-20 15:18:22,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 530 transitions, 10028 flow [2024-06-20 15:18:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:18:22,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:18:22,431 INFO L175 Difference]: Start difference. First operand has 386 places, 512 transitions, 8938 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:18:22,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 530 transitions, 10028 flow [2024-06-20 15:18:28,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 530 transitions, 9816 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:18:28,783 INFO L231 Difference]: Finished difference. Result has 389 places, 512 transitions, 8943 flow [2024-06-20 15:18:28,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8726, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8943, PETRI_PLACES=389, PETRI_TRANSITIONS=512} [2024-06-20 15:18:28,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-20 15:18:28,784 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 512 transitions, 8943 flow [2024-06-20 15:18:28,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:28,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:28,784 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] [2024-06-20 15:18:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:18:28,784 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:28,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1621631482, now seen corresponding path program 6 times [2024-06-20 15:18:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:28,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340943211] [2024-06-20 15:18:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340943211] [2024-06-20 15:18:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340943211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:28,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:28,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931784113] [2024-06-20 15:18:28,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:28,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:28,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:28,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:28,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 512 transitions, 8943 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:28,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:28,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:28,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:31,503 INFO L124 PetriNetUnfolderBase]: 6572/11245 cut-off events. [2024-06-20 15:18:31,503 INFO L125 PetriNetUnfolderBase]: For 2025658/2025658 co-relation queries the response was YES. [2024-06-20 15:18:31,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94150 conditions, 11245 events. 6572/11245 cut-off events. For 2025658/2025658 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 88073 event pairs, 2452 based on Foata normal form. 2/11225 useless extension candidates. Maximal degree in co-relation 93970. Up to 10069 conditions per place. [2024-06-20 15:18:31,849 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 416 selfloop transitions, 113 changer transitions 1/537 dead transitions. [2024-06-20 15:18:31,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 537 transitions, 10339 flow [2024-06-20 15:18:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:18:31,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:18:31,850 INFO L175 Difference]: Start difference. First operand has 389 places, 512 transitions, 8943 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:18:31,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 537 transitions, 10339 flow [2024-06-20 15:18:38,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 537 transitions, 10112 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:38,201 INFO L231 Difference]: Finished difference. Result has 392 places, 513 transitions, 8984 flow [2024-06-20 15:18:38,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8984, PETRI_PLACES=392, PETRI_TRANSITIONS=513} [2024-06-20 15:18:38,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-20 15:18:38,202 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 513 transitions, 8984 flow [2024-06-20 15:18:38,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:38,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:38,202 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] [2024-06-20 15:18:38,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:18:38,202 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:38,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1569462032, now seen corresponding path program 1 times [2024-06-20 15:18:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242676395] [2024-06-20 15:18:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:38,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:38,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:38,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242676395] [2024-06-20 15:18:38,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242676395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:38,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:38,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805657937] [2024-06-20 15:18:38,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:38,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:38,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 513 transitions, 8984 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:38,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:38,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:38,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:40,897 INFO L124 PetriNetUnfolderBase]: 6608/11332 cut-off events. [2024-06-20 15:18:40,897 INFO L125 PetriNetUnfolderBase]: For 2107753/2107753 co-relation queries the response was YES. [2024-06-20 15:18:41,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94980 conditions, 11332 events. 6608/11332 cut-off events. For 2107753/2107753 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89064 event pairs, 2484 based on Foata normal form. 10/11332 useless extension candidates. Maximal degree in co-relation 94798. Up to 10227 conditions per place. [2024-06-20 15:18:41,078 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 111 changer transitions 0/540 dead transitions. [2024-06-20 15:18:41,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 540 transitions, 10158 flow [2024-06-20 15:18:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:18:41,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:18:41,080 INFO L175 Difference]: Start difference. First operand has 392 places, 513 transitions, 8984 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:18:41,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 540 transitions, 10158 flow [2024-06-20 15:18:49,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 540 transitions, 9936 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:18:49,595 INFO L231 Difference]: Finished difference. Result has 396 places, 515 transitions, 9030 flow [2024-06-20 15:18:49,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9030, PETRI_PLACES=396, PETRI_TRANSITIONS=515} [2024-06-20 15:18:49,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-20 15:18:49,596 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 515 transitions, 9030 flow [2024-06-20 15:18:49,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:49,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:49,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:18:49,597 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:49,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -78291717, now seen corresponding path program 1 times [2024-06-20 15:18:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564198455] [2024-06-20 15:18:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:49,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:49,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:49,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564198455] [2024-06-20 15:18:49,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564198455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:49,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:49,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:49,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357922195] [2024-06-20 15:18:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:49,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:49,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:49,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:49,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 515 transitions, 9030 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:49,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:49,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:49,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:52,328 INFO L124 PetriNetUnfolderBase]: 6653/11425 cut-off events. [2024-06-20 15:18:52,328 INFO L125 PetriNetUnfolderBase]: For 2126009/2126012 co-relation queries the response was YES. [2024-06-20 15:18:52,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96457 conditions, 11425 events. 6653/11425 cut-off events. For 2126009/2126012 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89986 event pairs, 2558 based on Foata normal form. 3/11419 useless extension candidates. Maximal degree in co-relation 96274. Up to 9952 conditions per place. [2024-06-20 15:18:52,489 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 299 selfloop transitions, 247 changer transitions 0/553 dead transitions. [2024-06-20 15:18:52,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 553 transitions, 11156 flow [2024-06-20 15:18:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:18:52,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:18:52,491 INFO L175 Difference]: Start difference. First operand has 396 places, 515 transitions, 9030 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:18:52,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 553 transitions, 11156 flow [2024-06-20 15:19:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 553 transitions, 10914 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:00,212 INFO L231 Difference]: Finished difference. Result has 397 places, 533 transitions, 9632 flow [2024-06-20 15:19:00,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8788, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9632, PETRI_PLACES=397, PETRI_TRANSITIONS=533} [2024-06-20 15:19:00,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-20 15:19:00,212 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 533 transitions, 9632 flow [2024-06-20 15:19:00,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:00,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:00,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:00,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:19:00,213 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:00,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:00,213 INFO L85 PathProgramCache]: Analyzing trace with hash -839622825, now seen corresponding path program 2 times [2024-06-20 15:19:00,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:00,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099808755] [2024-06-20 15:19:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:00,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:00,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:00,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099808755] [2024-06-20 15:19:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099808755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:00,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718055100] [2024-06-20 15:19:00,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:00,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:00,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:00,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:00,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 533 transitions, 9632 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:00,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:00,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:00,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:02,998 INFO L124 PetriNetUnfolderBase]: 6650/11418 cut-off events. [2024-06-20 15:19:02,998 INFO L125 PetriNetUnfolderBase]: For 2159895/2159906 co-relation queries the response was YES. [2024-06-20 15:19:03,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96973 conditions, 11418 events. 6650/11418 cut-off events. For 2159895/2159906 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89870 event pairs, 2544 based on Foata normal form. 11/11421 useless extension candidates. Maximal degree in co-relation 96789. Up to 9949 conditions per place. [2024-06-20 15:19:03,169 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 295 selfloop transitions, 253 changer transitions 0/555 dead transitions. [2024-06-20 15:19:03,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 555 transitions, 11214 flow [2024-06-20 15:19:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:19:03,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:19:03,171 INFO L175 Difference]: Start difference. First operand has 397 places, 533 transitions, 9632 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:19:03,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 555 transitions, 11214 flow [2024-06-20 15:19:10,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 555 transitions, 10885 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:10,813 INFO L231 Difference]: Finished difference. Result has 401 places, 533 transitions, 9815 flow [2024-06-20 15:19:10,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9303, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9815, PETRI_PLACES=401, PETRI_TRANSITIONS=533} [2024-06-20 15:19:10,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-20 15:19:10,814 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 533 transitions, 9815 flow [2024-06-20 15:19:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:10,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:10,814 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] [2024-06-20 15:19:10,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:19:10,815 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:10,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash -835898175, now seen corresponding path program 3 times [2024-06-20 15:19:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:10,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060710566] [2024-06-20 15:19:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:10,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:10,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060710566] [2024-06-20 15:19:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060710566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:10,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:10,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693606143] [2024-06-20 15:19:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:10,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:10,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:11,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:11,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 533 transitions, 9815 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:11,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:11,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:11,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:13,770 INFO L124 PetriNetUnfolderBase]: 6655/11394 cut-off events. [2024-06-20 15:19:13,771 INFO L125 PetriNetUnfolderBase]: For 2201276/2201276 co-relation queries the response was YES. [2024-06-20 15:19:13,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97496 conditions, 11394 events. 6655/11394 cut-off events. For 2201276/2201276 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 89468 event pairs, 2517 based on Foata normal form. 1/11385 useless extension candidates. Maximal degree in co-relation 97311. Up to 9955 conditions per place. [2024-06-20 15:19:13,931 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 285 selfloop transitions, 270 changer transitions 0/562 dead transitions. [2024-06-20 15:19:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 562 transitions, 11473 flow [2024-06-20 15:19:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:19:13,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:19:13,932 INFO L175 Difference]: Start difference. First operand has 401 places, 533 transitions, 9815 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:19:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 562 transitions, 11473 flow [2024-06-20 15:19:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 562 transitions, 10518 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:22,408 INFO L231 Difference]: Finished difference. Result has 402 places, 536 transitions, 9454 flow [2024-06-20 15:19:22,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8872, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9454, PETRI_PLACES=402, PETRI_TRANSITIONS=536} [2024-06-20 15:19:22,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-20 15:19:22,409 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 536 transitions, 9454 flow [2024-06-20 15:19:22,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:22,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:22,410 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] [2024-06-20 15:19:22,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:19:22,410 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:22,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash 932845203, now seen corresponding path program 4 times [2024-06-20 15:19:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570439441] [2024-06-20 15:19:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:22,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:22,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570439441] [2024-06-20 15:19:22,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570439441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:22,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:22,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150622337] [2024-06-20 15:19:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:22,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:22,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 536 transitions, 9454 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:22,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:22,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:22,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:25,118 INFO L124 PetriNetUnfolderBase]: 6660/11431 cut-off events. [2024-06-20 15:19:25,119 INFO L125 PetriNetUnfolderBase]: For 2235781/2235784 co-relation queries the response was YES. [2024-06-20 15:19:25,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97718 conditions, 11431 events. 6660/11431 cut-off events. For 2235781/2235784 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 90010 event pairs, 2544 based on Foata normal form. 3/11425 useless extension candidates. Maximal degree in co-relation 97534. Up to 9961 conditions per place. [2024-06-20 15:19:25,478 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 313 selfloop transitions, 236 changer transitions 0/556 dead transitions. [2024-06-20 15:19:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 556 transitions, 11314 flow [2024-06-20 15:19:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:19:25,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:19:25,479 INFO L175 Difference]: Start difference. First operand has 402 places, 536 transitions, 9454 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:19:25,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 556 transitions, 11314 flow