./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:24:53,415 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:24:53,461 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:24:53,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:24:53,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:24:53,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:24:53,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:24:53,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:24:53,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:24:53,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:24:53,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:24:53,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:24:53,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:24:53,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:24:53,482 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:24:53,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:24:53,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:24:53,483 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:24:53,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:24:53,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:24:53,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:24:53,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:24:53,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:24:53,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:24:53,484 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:24:53,485 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:24:53,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:24:53,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:24:53,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:24:53,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:24:53,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:24:53,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:24:53,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:24:53,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:24:53,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:24:53,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:24:53,487 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:24:53,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:24:53,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:24:53,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:24:53,488 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:24:53,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:24:53,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:24:53,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:24:53,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:24:53,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:24:53,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:24:53,699 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:24:53,700 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:24:53,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 15:24:53,843 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:24:53,843 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:24:53,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:24:54,910 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:24:55,132 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:24:55,132 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:24:55,150 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1caa86077/289b10a7811a41ea8b8a3ef00fe15af5/FLAG226f1d699 [2024-06-20 15:24:55,162 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1caa86077/289b10a7811a41ea8b8a3ef00fe15af5 [2024-06-20 15:24:55,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:24:55,164 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:24:55,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:24:55,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:24:55,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:24:55,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:24:53" (1/2) ... [2024-06-20 15:24:55,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f86bbce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:24:55, skipping insertion in model container [2024-06-20 15:24:55,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:24:53" (1/2) ... [2024-06-20 15:24:55,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@783f4175 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:24:55, skipping insertion in model container [2024-06-20 15:24:55,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:24:55" (2/2) ... [2024-06-20 15:24:55,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f86bbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55, skipping insertion in model container [2024-06-20 15:24:55,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:24:55" (2/2) ... [2024-06-20 15:24:55,174 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:24:55,208 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:24:55,209 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:24:55,210 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:24:55,210 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:24:55,210 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:24:55,210 INFO L106 edCorrectnessWitness]: ghost_update [L776-L776] multithreaded = 1; [2024-06-20 15:24:55,244 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:24:55,507 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:24:55,513 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:24:55,593 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:24:55,683 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:24:55,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55 WrapperNode [2024-06-20 15:24:55,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:24:55,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:24:55,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:24:55,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:24:55,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,755 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-20 15:24:55,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:24:55,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:24:55,756 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:24:55,756 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:24:55,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,766 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,776 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 15:24:55,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,780 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:24:55,785 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:24:55,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:24:55,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:24:55,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (1/1) ... [2024-06-20 15:24:55,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:24:55,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:24:55,811 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 15:24:55,814 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 15:24:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:24:55,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:24:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:24:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:24:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:24:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:24:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:24:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:24:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:24:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:24:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:24:55,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:24:55,849 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 15:24:55,983 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:24:55,985 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:24:56,150 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:24:56,150 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:24:56,217 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:24:56,217 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:24:56,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:24:56 BoogieIcfgContainer [2024-06-20 15:24:56,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:24:56,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:24:56,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:24:56,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:24:56,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:24:53" (1/4) ... [2024-06-20 15:24:56,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23014101 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:24:56, skipping insertion in model container [2024-06-20 15:24:56,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:24:55" (2/4) ... [2024-06-20 15:24:56,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23014101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:24:56, skipping insertion in model container [2024-06-20 15:24:56,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:24:55" (3/4) ... [2024-06-20 15:24:56,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23014101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:24:56, skipping insertion in model container [2024-06-20 15:24:56,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:24:56" (4/4) ... [2024-06-20 15:24:56,224 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:24:56,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:24:56,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:24:56,237 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:24:56,295 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:24:56,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:24:56,356 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 15:24:56,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:24:56,358 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 66 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 15:24:56,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:24:56,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 15:24:56,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:24:56,387 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;@2e4eba15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:24:56,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:24:56,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:24:56,392 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:24:56,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:24:56,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:56,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:24:56,393 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 15:24:56,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash 217843597, now seen corresponding path program 1 times [2024-06-20 15:24:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:56,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115304679] [2024-06-20 15:24:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:56,845 INFO 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 15:24:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115304679] [2024-06-20 15:24:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115304679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:56,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:56,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:24:56,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954575284] [2024-06-20 15:24:56,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:56,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:24:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:24:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:24:56,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-20 15:24:56,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:56,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:56,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-20 15:24:56,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:57,078 INFO L124 PetriNetUnfolderBase]: 471/816 cut-off events. [2024-06-20 15:24:57,078 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 15:24:57,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 816 events. 471/816 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4041 event pairs, 288 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 1592. Up to 733 conditions per place. [2024-06-20 15:24:57,089 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 15:24:57,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-20 15:24:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:24:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:24:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-20 15:24:57,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-20 15:24:57,102 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-20 15:24:57,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-20 15:24:57,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:24:57,106 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 15:24:57,108 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 15:24:57,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 15:24:57,110 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 15:24:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:57,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:57,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:24:57,111 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 15:24:57,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1105673172, now seen corresponding path program 1 times [2024-06-20 15:24:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:57,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997744842] [2024-06-20 15:24:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:57,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997744842] [2024-06-20 15:24:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997744842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:57,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:24:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119997010] [2024-06-20 15:24:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:24:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:24:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:24:57,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-20 15:24:57,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:57,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-20 15:24:57,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:57,380 INFO L124 PetriNetUnfolderBase]: 472/820 cut-off events. [2024-06-20 15:24:57,380 INFO L125 PetriNetUnfolderBase]: For 164/172 co-relation queries the response was YES. [2024-06-20 15:24:57,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 820 events. 472/820 cut-off events. For 164/172 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4030 event pairs, 232 based on Foata normal form. 7/809 useless extension candidates. Maximal degree in co-relation 1864. Up to 707 conditions per place. [2024-06-20 15:24:57,385 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 36 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-20 15:24:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 256 flow [2024-06-20 15:24:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:24:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:24:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-20 15:24:57,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-06-20 15:24:57,389 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 116 transitions. [2024-06-20 15:24:57,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 256 flow [2024-06-20 15:24:57,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:24:57,392 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-20 15:24:57,393 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-20 15:24:57,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 15:24:57,393 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-20 15:24:57,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:57,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:24:57,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:57,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1589893622, now seen corresponding path program 1 times [2024-06-20 15:24:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441686107] [2024-06-20 15:24:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:57,586 INFO 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 15:24:57,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441686107] [2024-06-20 15:24:57,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441686107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:57,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:57,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:24:57,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971132318] [2024-06-20 15:24:57,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:57,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:24:57,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:24:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:24:57,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:57,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:57,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:57,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:57,716 INFO L124 PetriNetUnfolderBase]: 728/1202 cut-off events. [2024-06-20 15:24:57,716 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-06-20 15:24:57,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 1202 events. 728/1202 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5880 event pairs, 392 based on Foata normal form. 2/1203 useless extension candidates. Maximal degree in co-relation 3263. Up to 1104 conditions per place. [2024-06-20 15:24:57,724 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-20 15:24:57,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 327 flow [2024-06-20 15:24:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:24:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:24:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:24:57,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:24:57,728 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:24:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 327 flow [2024-06-20 15:24:57,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 323 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:24:57,732 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 229 flow [2024-06-20 15:24:57,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-06-20 15:24:57,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-20 15:24:57,733 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 229 flow [2024-06-20 15:24:57,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:57,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:24:57,734 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 15:24:57,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1070247574, now seen corresponding path program 1 times [2024-06-20 15:24:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418866758] [2024-06-20 15:24:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:57,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:57,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418866758] [2024-06-20 15:24:57,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418866758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:57,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:24:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589089520] [2024-06-20 15:24:57,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:57,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:24:57,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:24:57,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:24:57,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:24:57,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:57,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:57,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:24:57,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:58,075 INFO L124 PetriNetUnfolderBase]: 722/1212 cut-off events. [2024-06-20 15:24:58,075 INFO L125 PetriNetUnfolderBase]: For 1438/1450 co-relation queries the response was YES. [2024-06-20 15:24:58,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 1212 events. 722/1212 cut-off events. For 1438/1450 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6019 event pairs, 189 based on Foata normal form. 20/1220 useless extension candidates. Maximal degree in co-relation 3616. Up to 978 conditions per place. [2024-06-20 15:24:58,081 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-20 15:24:58,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 485 flow [2024-06-20 15:24:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:24:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:24:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-20 15:24:58,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-20 15:24:58,083 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 229 flow. Second operand 6 states and 166 transitions. [2024-06-20 15:24:58,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 485 flow [2024-06-20 15:24:58,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 481 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:24:58,086 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-20 15:24:58,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-20 15:24:58,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-20 15:24:58,087 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-20 15:24:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:58,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:24:58,088 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 15:24:58,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1113959529, now seen corresponding path program 1 times [2024-06-20 15:24:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:58,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028351747] [2024-06-20 15:24:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:58,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028351747] [2024-06-20 15:24:58,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028351747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:58,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:58,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:24:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990956981] [2024-06-20 15:24:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:58,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:24:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:24:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:24:58,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:58,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:58,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:58,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:58,312 INFO L124 PetriNetUnfolderBase]: 763/1270 cut-off events. [2024-06-20 15:24:58,312 INFO L125 PetriNetUnfolderBase]: For 2183/2183 co-relation queries the response was YES. [2024-06-20 15:24:58,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 1270 events. 763/1270 cut-off events. For 2183/2183 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6270 event pairs, 266 based on Foata normal form. 2/1270 useless extension candidates. Maximal degree in co-relation 4209. Up to 1125 conditions per place. [2024-06-20 15:24:58,320 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 59 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2024-06-20 15:24:58,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 557 flow [2024-06-20 15:24:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:24:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:24:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:24:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:24:58,321 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:24:58,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 557 flow [2024-06-20 15:24:58,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 517 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:24:58,325 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 358 flow [2024-06-20 15:24:58,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-20 15:24:58,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 15:24:58,326 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 358 flow [2024-06-20 15:24:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:58,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:58,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:24:58,327 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 15:24:58,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2115271477, now seen corresponding path program 2 times [2024-06-20 15:24:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:58,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444200112] [2024-06-20 15:24:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:58,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:58,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444200112] [2024-06-20 15:24:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444200112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:24:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612895842] [2024-06-20 15:24:58,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:24:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:24:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:24:58,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:58,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:58,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:58,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:58,611 INFO L124 PetriNetUnfolderBase]: 758/1261 cut-off events. [2024-06-20 15:24:58,611 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-20 15:24:58,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4445 conditions, 1261 events. 758/1261 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6199 event pairs, 269 based on Foata normal form. 2/1261 useless extension candidates. Maximal degree in co-relation 4420. Up to 1120 conditions per place. [2024-06-20 15:24:58,620 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-20 15:24:58,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 541 flow [2024-06-20 15:24:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:24:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:24:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 15:24:58,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:24:58,621 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 358 flow. Second operand 5 states and 125 transitions. [2024-06-20 15:24:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 541 flow [2024-06-20 15:24:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 515 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-20 15:24:58,625 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 377 flow [2024-06-20 15:24:58,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-20 15:24:58,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-20 15:24:58,626 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 377 flow [2024-06-20 15:24:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:58,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:24:58,627 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 15:24:58,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1120634697, now seen corresponding path program 1 times [2024-06-20 15:24:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124097651] [2024-06-20 15:24:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:58,714 INFO 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 15:24:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:58,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124097651] [2024-06-20 15:24:58,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124097651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:58,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:58,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:24:58,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338499215] [2024-06-20 15:24:58,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:58,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:24:58,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:24:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:24:58,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:58,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:58,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:58,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:58,893 INFO L124 PetriNetUnfolderBase]: 750/1254 cut-off events. [2024-06-20 15:24:58,894 INFO L125 PetriNetUnfolderBase]: For 3254/3254 co-relation queries the response was YES. [2024-06-20 15:24:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 1254 events. 750/1254 cut-off events. For 3254/3254 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6144 event pairs, 246 based on Foata normal form. 4/1257 useless extension candidates. Maximal degree in co-relation 4446. Up to 1123 conditions per place. [2024-06-20 15:24:58,903 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 63 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2024-06-20 15:24:58,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 573 flow [2024-06-20 15:24:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:24:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:24:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:24:58,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-20 15:24:58,904 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 377 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:24:58,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 573 flow [2024-06-20 15:24:58,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 551 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:24:58,908 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 396 flow [2024-06-20 15:24:58,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-20 15:24:58,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-20 15:24:58,910 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 396 flow [2024-06-20 15:24:58,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:58,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:58,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:58,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:24:58,911 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 15:24:58,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1063530184, now seen corresponding path program 1 times [2024-06-20 15:24:58,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:58,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368688945] [2024-06-20 15:24:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368688945] [2024-06-20 15:24:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368688945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:24:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022655702] [2024-06-20 15:24:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:24:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:24:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:24:59,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:59,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:59,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:59,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:59,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:59,216 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-20 15:24:59,216 INFO L125 PetriNetUnfolderBase]: For 4190/4190 co-relation queries the response was YES. [2024-06-20 15:24:59,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1297 events. 773/1297 cut-off events. For 4190/4190 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6526 event pairs, 216 based on Foata normal form. 4/1298 useless extension candidates. Maximal degree in co-relation 4742. Up to 1101 conditions per place. [2024-06-20 15:24:59,224 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-20 15:24:59,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 694 flow [2024-06-20 15:24:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:24:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:24:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-20 15:24:59,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-20 15:24:59,226 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 396 flow. Second operand 6 states and 162 transitions. [2024-06-20 15:24:59,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 694 flow [2024-06-20 15:24:59,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 671 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:24:59,233 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 469 flow [2024-06-20 15:24:59,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-20 15:24:59,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-20 15:24:59,236 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 469 flow [2024-06-20 15:24:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:59,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:59,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:24:59,237 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 15:24:59,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1068291784, now seen corresponding path program 2 times [2024-06-20 15:24:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871491196] [2024-06-20 15:24:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:59,366 INFO 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 15:24:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:59,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871491196] [2024-06-20 15:24:59,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871491196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:59,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:59,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:24:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386314541] [2024-06-20 15:24:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:59,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:24:59,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:24:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:24:59,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:59,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:59,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:59,525 INFO L124 PetriNetUnfolderBase]: 784/1325 cut-off events. [2024-06-20 15:24:59,526 INFO L125 PetriNetUnfolderBase]: For 4939/4939 co-relation queries the response was YES. [2024-06-20 15:24:59,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 1325 events. 784/1325 cut-off events. For 4939/4939 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6680 event pairs, 243 based on Foata normal form. 2/1325 useless extension candidates. Maximal degree in co-relation 5288. Up to 1113 conditions per place. [2024-06-20 15:24:59,536 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 24 changer transitions 0/103 dead transitions. [2024-06-20 15:24:59,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 828 flow [2024-06-20 15:24:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:24:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:24:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:24:59,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 15:24:59,537 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 469 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:24:59,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 828 flow [2024-06-20 15:24:59,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 757 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:24:59,546 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 564 flow [2024-06-20 15:24:59,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-20 15:24:59,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 15:24:59,547 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 564 flow [2024-06-20 15:24:59,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:59,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:59,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:59,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:24:59,548 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 15:24:59,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1068298728, now seen corresponding path program 1 times [2024-06-20 15:24:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:59,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891027350] [2024-06-20 15:24:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:59,657 INFO 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 15:24:59,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891027350] [2024-06-20 15:24:59,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891027350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:59,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:59,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:24:59,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068356175] [2024-06-20 15:24:59,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:59,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:24:59,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:24:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:24:59,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:24:59,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:59,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:59,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:24:59,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:59,866 INFO L124 PetriNetUnfolderBase]: 801/1350 cut-off events. [2024-06-20 15:24:59,866 INFO L125 PetriNetUnfolderBase]: For 6350/6350 co-relation queries the response was YES. [2024-06-20 15:24:59,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5728 conditions, 1350 events. 801/1350 cut-off events. For 6350/6350 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6767 event pairs, 239 based on Foata normal form. 4/1352 useless extension candidates. Maximal degree in co-relation 5696. Up to 1166 conditions per place. [2024-06-20 15:24:59,877 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-20 15:24:59,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 830 flow [2024-06-20 15:24:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:24:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:24:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:24:59,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:24:59,879 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 564 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:24:59,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 830 flow [2024-06-20 15:24:59,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 104 transitions, 808 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 15:24:59,888 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 603 flow [2024-06-20 15:24:59,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-06-20 15:24:59,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-20 15:24:59,889 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 603 flow [2024-06-20 15:24:59,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:59,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:59,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:59,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:24:59,890 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 15:24:59,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1256317270, now seen corresponding path program 3 times [2024-06-20 15:24:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702108088] [2024-06-20 15:24:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:59,992 INFO 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 15:24:59,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702108088] [2024-06-20 15:24:59,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702108088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:59,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:59,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:24:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96848795] [2024-06-20 15:24:59,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:59,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:24:59,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:24:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:00,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:00,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 603 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:00,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:00,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:00,147 INFO L124 PetriNetUnfolderBase]: 796/1336 cut-off events. [2024-06-20 15:25:00,147 INFO L125 PetriNetUnfolderBase]: For 7305/7305 co-relation queries the response was YES. [2024-06-20 15:25:00,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5914 conditions, 1336 events. 796/1336 cut-off events. For 7305/7305 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6673 event pairs, 251 based on Foata normal form. 2/1335 useless extension candidates. Maximal degree in co-relation 5880. Up to 1135 conditions per place. [2024-06-20 15:25:00,162 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 68 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-20 15:25:00,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 848 flow [2024-06-20 15:25:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:25:00,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:25:00,163 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 603 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:25:00,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 848 flow [2024-06-20 15:25:00,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 791 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:00,170 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 615 flow [2024-06-20 15:25:00,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=615, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-20 15:25:00,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-20 15:25:00,171 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 615 flow [2024-06-20 15:25:00,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:00,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:00,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:25:00,171 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 15:25:00,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash 4905016, now seen corresponding path program 2 times [2024-06-20 15:25:00,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:00,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493017863] [2024-06-20 15:25:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:00,300 INFO 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 15:25:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493017863] [2024-06-20 15:25:00,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493017863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:00,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:00,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:00,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808403463] [2024-06-20 15:25:00,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:00,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:00,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:00,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:00,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:00,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 615 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:00,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:00,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:00,490 INFO L124 PetriNetUnfolderBase]: 813/1378 cut-off events. [2024-06-20 15:25:00,490 INFO L125 PetriNetUnfolderBase]: For 8392/8392 co-relation queries the response was YES. [2024-06-20 15:25:00,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6112 conditions, 1378 events. 813/1378 cut-off events. For 8392/8392 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6960 event pairs, 249 based on Foata normal form. 4/1380 useless extension candidates. Maximal degree in co-relation 6077. Up to 1186 conditions per place. [2024-06-20 15:25:00,500 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-20 15:25:00,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 877 flow [2024-06-20 15:25:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:25:00,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:25:00,501 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 615 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:25:00,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 877 flow [2024-06-20 15:25:00,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 833 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:00,510 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 636 flow [2024-06-20 15:25:00,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=636, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-20 15:25:00,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-20 15:25:00,511 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 636 flow [2024-06-20 15:25:00,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:00,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:00,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:25:00,512 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 15:25:00,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash 5144026, now seen corresponding path program 3 times [2024-06-20 15:25:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:00,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871474801] [2024-06-20 15:25:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:00,603 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 15:25:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:00,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871474801] [2024-06-20 15:25:00,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871474801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:00,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:00,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:00,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263762527] [2024-06-20 15:25:00,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:00,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:00,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 636 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:00,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:00,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:00,801 INFO L124 PetriNetUnfolderBase]: 805/1366 cut-off events. [2024-06-20 15:25:00,801 INFO L125 PetriNetUnfolderBase]: For 9531/9531 co-relation queries the response was YES. [2024-06-20 15:25:00,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 1366 events. 805/1366 cut-off events. For 9531/9531 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6924 event pairs, 218 based on Foata normal form. 4/1368 useless extension candidates. Maximal degree in co-relation 6148. Up to 1115 conditions per place. [2024-06-20 15:25:00,809 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 77 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-20 15:25:00,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 910 flow [2024-06-20 15:25:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:25:00,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:25:00,811 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 636 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:25:00,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 910 flow [2024-06-20 15:25:00,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 863 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:00,820 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 668 flow [2024-06-20 15:25:00,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=668, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-20 15:25:00,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-20 15:25:00,822 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 668 flow [2024-06-20 15:25:00,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:00,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:00,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:25:00,822 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 15:25:00,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1834330822, now seen corresponding path program 1 times [2024-06-20 15:25:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:00,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127196568] [2024-06-20 15:25:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:00,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:00,919 INFO 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 15:25:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127196568] [2024-06-20 15:25:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127196568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:00,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:00,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:25:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024401679] [2024-06-20 15:25:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:00,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:25:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:25:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:25:00,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:25:00,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 668 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:00,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:25:00,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:01,056 INFO L124 PetriNetUnfolderBase]: 727/1257 cut-off events. [2024-06-20 15:25:01,056 INFO L125 PetriNetUnfolderBase]: For 9946/9951 co-relation queries the response was YES. [2024-06-20 15:25:01,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5784 conditions, 1257 events. 727/1257 cut-off events. For 9946/9951 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6407 event pairs, 246 based on Foata normal form. 8/1261 useless extension candidates. Maximal degree in co-relation 5746. Up to 1045 conditions per place. [2024-06-20 15:25:01,065 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 60 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-20 15:25:01,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 844 flow [2024-06-20 15:25:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:25:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:25:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-20 15:25:01,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:25:01,066 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 668 flow. Second operand 4 states and 104 transitions. [2024-06-20 15:25:01,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 844 flow [2024-06-20 15:25:01,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 94 transitions, 783 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:01,077 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 652 flow [2024-06-20 15:25:01,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=652, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-20 15:25:01,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-20 15:25:01,078 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 652 flow [2024-06-20 15:25:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:01,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:25:01,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:01,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1034448361, now seen corresponding path program 1 times [2024-06-20 15:25:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:01,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492836966] [2024-06-20 15:25:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:01,170 INFO 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 15:25:01,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:01,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492836966] [2024-06-20 15:25:01,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492836966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:01,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:01,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:25:01,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811360481] [2024-06-20 15:25:01,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:01,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:25:01,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:25:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:25:01,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:01,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 652 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:01,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:01,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:01,358 INFO L124 PetriNetUnfolderBase]: 785/1330 cut-off events. [2024-06-20 15:25:01,358 INFO L125 PetriNetUnfolderBase]: For 10738/10738 co-relation queries the response was YES. [2024-06-20 15:25:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6193 conditions, 1330 events. 785/1330 cut-off events. For 10738/10738 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6634 event pairs, 235 based on Foata normal form. 1/1330 useless extension candidates. Maximal degree in co-relation 6154. Up to 1183 conditions per place. [2024-06-20 15:25:01,369 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 82 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-20 15:25:01,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 966 flow [2024-06-20 15:25:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 15:25:01,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-20 15:25:01,370 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 652 flow. Second operand 5 states and 122 transitions. [2024-06-20 15:25:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 966 flow [2024-06-20 15:25:01,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 105 transitions, 922 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:01,381 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 710 flow [2024-06-20 15:25:01,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-20 15:25:01,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-20 15:25:01,383 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 710 flow [2024-06-20 15:25:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:25:01,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:01,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -428206471, now seen corresponding path program 2 times [2024-06-20 15:25:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681377773] [2024-06-20 15:25:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:01,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681377773] [2024-06-20 15:25:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681377773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:01,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:25:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431281465] [2024-06-20 15:25:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:25:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:25:01,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:25:01,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:01,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:01,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:01,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:01,645 INFO L124 PetriNetUnfolderBase]: 782/1326 cut-off events. [2024-06-20 15:25:01,646 INFO L125 PetriNetUnfolderBase]: For 11978/11978 co-relation queries the response was YES. [2024-06-20 15:25:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6370 conditions, 1326 events. 782/1326 cut-off events. For 11978/11978 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6611 event pairs, 235 based on Foata normal form. 1/1326 useless extension candidates. Maximal degree in co-relation 6331. Up to 1183 conditions per place. [2024-06-20 15:25:01,654 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-06-20 15:25:01,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 928 flow [2024-06-20 15:25:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:25:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:25:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:25:01,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:25:01,656 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 710 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:25:01,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 928 flow [2024-06-20 15:25:01,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 882 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-20 15:25:01,671 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 698 flow [2024-06-20 15:25:01,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=698, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-06-20 15:25:01,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-20 15:25:01,672 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 698 flow [2024-06-20 15:25:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:01,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:01,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:25:01,673 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:01,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash -152523481, now seen corresponding path program 1 times [2024-06-20 15:25:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:01,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491422512] [2024-06-20 15:25:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:01,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:01,779 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 15:25:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491422512] [2024-06-20 15:25:01,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491422512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:01,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:01,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665515092] [2024-06-20 15:25:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:01,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:01,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:01,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:01,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:02,101 INFO L124 PetriNetUnfolderBase]: 1178/1992 cut-off events. [2024-06-20 15:25:02,101 INFO L125 PetriNetUnfolderBase]: For 26474/26474 co-relation queries the response was YES. [2024-06-20 15:25:02,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9638 conditions, 1992 events. 1178/1992 cut-off events. For 26474/26474 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10890 event pairs, 279 based on Foata normal form. 42/2031 useless extension candidates. Maximal degree in co-relation 9597. Up to 1089 conditions per place. [2024-06-20 15:25:02,114 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 101 selfloop transitions, 33 changer transitions 4/146 dead transitions. [2024-06-20 15:25:02,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 146 transitions, 1262 flow [2024-06-20 15:25:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-20 15:25:02,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-06-20 15:25:02,116 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 698 flow. Second operand 8 states and 218 transitions. [2024-06-20 15:25:02,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 146 transitions, 1262 flow [2024-06-20 15:25:02,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 1238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:02,144 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 825 flow [2024-06-20 15:25:02,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-20 15:25:02,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 15:25:02,145 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 825 flow [2024-06-20 15:25:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:02,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:02,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:25:02,145 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 15:25:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -149666521, now seen corresponding path program 2 times [2024-06-20 15:25:02,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:02,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276676777] [2024-06-20 15:25:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:02,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:02,252 INFO 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 15:25:02,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:02,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276676777] [2024-06-20 15:25:02,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276676777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:02,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:02,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:02,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131208766] [2024-06-20 15:25:02,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:02,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:02,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:02,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:02,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 825 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:02,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:02,537 INFO L124 PetriNetUnfolderBase]: 1051/1787 cut-off events. [2024-06-20 15:25:02,537 INFO L125 PetriNetUnfolderBase]: For 24175/24175 co-relation queries the response was YES. [2024-06-20 15:25:02,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 1787 events. 1051/1787 cut-off events. For 24175/24175 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9575 event pairs, 332 based on Foata normal form. 50/1834 useless extension candidates. Maximal degree in co-relation 8526. Up to 1320 conditions per place. [2024-06-20 15:25:02,547 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 95 selfloop transitions, 28 changer transitions 3/134 dead transitions. [2024-06-20 15:25:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 134 transitions, 1214 flow [2024-06-20 15:25:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:25:02,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-20 15:25:02,549 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 825 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:25:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 134 transitions, 1214 flow [2024-06-20 15:25:02,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1144 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:02,570 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 836 flow [2024-06-20 15:25:02,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2024-06-20 15:25:02,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 15:25:02,571 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 836 flow [2024-06-20 15:25:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:02,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:25:02,572 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 15:25:02,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash -34375351, now seen corresponding path program 3 times [2024-06-20 15:25:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960932051] [2024-06-20 15:25:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:02,672 INFO 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 15:25:02,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960932051] [2024-06-20 15:25:02,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960932051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:02,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:02,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:02,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137911553] [2024-06-20 15:25:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:02,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:02,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:02,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:02,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 836 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:02,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:02,949 INFO L124 PetriNetUnfolderBase]: 1099/1880 cut-off events. [2024-06-20 15:25:02,949 INFO L125 PetriNetUnfolderBase]: For 20984/20984 co-relation queries the response was YES. [2024-06-20 15:25:02,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8961 conditions, 1880 events. 1099/1880 cut-off events. For 20984/20984 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10210 event pairs, 349 based on Foata normal form. 16/1894 useless extension candidates. Maximal degree in co-relation 8916. Up to 1561 conditions per place. [2024-06-20 15:25:02,961 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 94 selfloop transitions, 26 changer transitions 0/128 dead transitions. [2024-06-20 15:25:02,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 1184 flow [2024-06-20 15:25:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:25:02,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:25:02,962 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 836 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:25:02,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 1184 flow [2024-06-20 15:25:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1132 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:02,987 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 863 flow [2024-06-20 15:25:02,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2024-06-20 15:25:02,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-20 15:25:02,987 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 863 flow [2024-06-20 15:25:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:02,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:02,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:25:02,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:02,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 137934983, now seen corresponding path program 1 times [2024-06-20 15:25:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:02,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488713224] [2024-06-20 15:25:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:03,085 INFO 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 15:25:03,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:03,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488713224] [2024-06-20 15:25:03,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488713224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:03,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:03,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632095033] [2024-06-20 15:25:03,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:03,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:03,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:03,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:03,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:03,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 863 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:03,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:03,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:03,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:03,357 INFO L124 PetriNetUnfolderBase]: 1140/1961 cut-off events. [2024-06-20 15:25:03,357 INFO L125 PetriNetUnfolderBase]: For 22870/22870 co-relation queries the response was YES. [2024-06-20 15:25:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9373 conditions, 1961 events. 1140/1961 cut-off events. For 22870/22870 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10862 event pairs, 345 based on Foata normal form. 12/1971 useless extension candidates. Maximal degree in co-relation 9327. Up to 1453 conditions per place. [2024-06-20 15:25:03,372 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 29 changer transitions 0/132 dead transitions. [2024-06-20 15:25:03,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1233 flow [2024-06-20 15:25:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:25:03,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:25:03,374 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 863 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:25:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1233 flow [2024-06-20 15:25:03,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 1174 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:03,399 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 890 flow [2024-06-20 15:25:03,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-20 15:25:03,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-20 15:25:03,400 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 890 flow [2024-06-20 15:25:03,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:03,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:03,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:03,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:25:03,401 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 15:25:03,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash -545647347, now seen corresponding path program 4 times [2024-06-20 15:25:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:03,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946951037] [2024-06-20 15:25:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:03,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:03,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:03,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946951037] [2024-06-20 15:25:03,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946951037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:03,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:03,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:03,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594912795] [2024-06-20 15:25:03,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:03,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:03,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:03,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:03,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:03,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:03,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:03,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:03,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:03,713 INFO L124 PetriNetUnfolderBase]: 1173/2013 cut-off events. [2024-06-20 15:25:03,714 INFO L125 PetriNetUnfolderBase]: For 25262/25262 co-relation queries the response was YES. [2024-06-20 15:25:03,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 2013 events. 1173/2013 cut-off events. For 25262/25262 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11244 event pairs, 382 based on Foata normal form. 16/2026 useless extension candidates. Maximal degree in co-relation 9576. Up to 1691 conditions per place. [2024-06-20 15:25:03,727 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 93 selfloop transitions, 26 changer transitions 0/127 dead transitions. [2024-06-20 15:25:03,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1232 flow [2024-06-20 15:25:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:25:03,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:25:03,728 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 890 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:25:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1232 flow [2024-06-20 15:25:03,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 127 transitions, 1171 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:03,801 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 912 flow [2024-06-20 15:25:03,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-06-20 15:25:03,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 15:25:03,801 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 912 flow [2024-06-20 15:25:03,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:03,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:03,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:25:03,802 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 15:25:03,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash 418794199, now seen corresponding path program 2 times [2024-06-20 15:25:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:03,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170493143] [2024-06-20 15:25:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:03,886 INFO 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 15:25:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170493143] [2024-06-20 15:25:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170493143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:03,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:03,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292261897] [2024-06-20 15:25:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:03,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:03,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 912 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:03,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:03,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:03,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:04,147 INFO L124 PetriNetUnfolderBase]: 1214/2094 cut-off events. [2024-06-20 15:25:04,147 INFO L125 PetriNetUnfolderBase]: For 26794/26794 co-relation queries the response was YES. [2024-06-20 15:25:04,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9978 conditions, 2094 events. 1214/2094 cut-off events. For 26794/26794 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11814 event pairs, 382 based on Foata normal form. 12/2103 useless extension candidates. Maximal degree in co-relation 9930. Up to 1675 conditions per place. [2024-06-20 15:25:04,162 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2024-06-20 15:25:04,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1276 flow [2024-06-20 15:25:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:25:04,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:25:04,164 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 912 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:25:04,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1276 flow [2024-06-20 15:25:04,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 131 transitions, 1213 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:04,193 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 937 flow [2024-06-20 15:25:04,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=937, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-20 15:25:04,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-20 15:25:04,193 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 937 flow [2024-06-20 15:25:04,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:04,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:25:04,195 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 15:25:04,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 984385245, now seen corresponding path program 3 times [2024-06-20 15:25:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:04,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937379362] [2024-06-20 15:25:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:04,294 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 15:25:04,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:04,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937379362] [2024-06-20 15:25:04,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937379362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:04,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:04,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467138182] [2024-06-20 15:25:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:04,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:04,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:04,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:04,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:04,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:04,579 INFO L124 PetriNetUnfolderBase]: 1194/2062 cut-off events. [2024-06-20 15:25:04,580 INFO L125 PetriNetUnfolderBase]: For 25740/25740 co-relation queries the response was YES. [2024-06-20 15:25:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9617 conditions, 2062 events. 1194/2062 cut-off events. For 25740/25740 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11654 event pairs, 327 based on Foata normal form. 12/2071 useless extension candidates. Maximal degree in co-relation 9568. Up to 1262 conditions per place. [2024-06-20 15:25:04,591 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 88 selfloop transitions, 35 changer transitions 0/131 dead transitions. [2024-06-20 15:25:04,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 1239 flow [2024-06-20 15:25:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:25:04,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:04,593 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 937 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:25:04,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 1239 flow [2024-06-20 15:25:04,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 131 transitions, 1167 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:04,627 INFO L231 Difference]: Finished difference. Result has 108 places, 100 transitions, 899 flow [2024-06-20 15:25:04,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=899, PETRI_PLACES=108, PETRI_TRANSITIONS=100} [2024-06-20 15:25:04,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 15:25:04,628 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 100 transitions, 899 flow [2024-06-20 15:25:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:04,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:04,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:25:04,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:04,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash -561238237, now seen corresponding path program 1 times [2024-06-20 15:25:04,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:04,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909353916] [2024-06-20 15:25:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:04,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:04,705 INFO 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 15:25:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909353916] [2024-06-20 15:25:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909353916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:04,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:04,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:04,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572446942] [2024-06-20 15:25:04,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:04,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 100 transitions, 899 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:04,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:04,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:04,895 INFO L124 PetriNetUnfolderBase]: 1222/2115 cut-off events. [2024-06-20 15:25:04,895 INFO L125 PetriNetUnfolderBase]: For 25631/25631 co-relation queries the response was YES. [2024-06-20 15:25:04,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9958 conditions, 2115 events. 1222/2115 cut-off events. For 25631/25631 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11977 event pairs, 378 based on Foata normal form. 2/2115 useless extension candidates. Maximal degree in co-relation 9908. Up to 1837 conditions per place. [2024-06-20 15:25:04,908 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 33 changer transitions 0/131 dead transitions. [2024-06-20 15:25:04,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 131 transitions, 1441 flow [2024-06-20 15:25:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:25:04,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:25:04,909 INFO L175 Difference]: Start difference. First operand has 108 places, 100 transitions, 899 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:25:04,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 131 transitions, 1441 flow [2024-06-20 15:25:04,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 131 transitions, 1353 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:04,939 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1062 flow [2024-06-20 15:25:04,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1062, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-06-20 15:25:04,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-20 15:25:04,940 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1062 flow [2024-06-20 15:25:04,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:04,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:04,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:25:04,941 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 15:25:04,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash -389497927, now seen corresponding path program 2 times [2024-06-20 15:25:04,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:04,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066492061] [2024-06-20 15:25:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:05,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:05,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066492061] [2024-06-20 15:25:05,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066492061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:05,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:05,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127171599] [2024-06-20 15:25:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:05,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:05,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:05,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1062 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:05,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:05,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:05,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:05,254 INFO L124 PetriNetUnfolderBase]: 1247/2154 cut-off events. [2024-06-20 15:25:05,254 INFO L125 PetriNetUnfolderBase]: For 28181/28181 co-relation queries the response was YES. [2024-06-20 15:25:05,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10477 conditions, 2154 events. 1247/2154 cut-off events. For 28181/28181 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12255 event pairs, 389 based on Foata normal form. 3/2154 useless extension candidates. Maximal degree in co-relation 10424. Up to 1840 conditions per place. [2024-06-20 15:25:05,267 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 86 selfloop transitions, 45 changer transitions 0/139 dead transitions. [2024-06-20 15:25:05,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 139 transitions, 1544 flow [2024-06-20 15:25:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:25:05,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-20 15:25:05,268 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1062 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:25:05,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 139 transitions, 1544 flow [2024-06-20 15:25:05,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 139 transitions, 1482 flow, removed 31 selfloop flow, removed 0 redundant places. [2024-06-20 15:25:05,308 INFO L231 Difference]: Finished difference. Result has 117 places, 125 transitions, 1270 flow [2024-06-20 15:25:05,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1270, PETRI_PLACES=117, PETRI_TRANSITIONS=125} [2024-06-20 15:25:05,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-20 15:25:05,309 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 125 transitions, 1270 flow [2024-06-20 15:25:05,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:05,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:05,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:05,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:25:05,310 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 15:25:05,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2142234227, now seen corresponding path program 3 times [2024-06-20 15:25:05,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115312995] [2024-06-20 15:25:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:05,392 INFO 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 15:25:05,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:05,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115312995] [2024-06-20 15:25:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115312995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:05,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373616057] [2024-06-20 15:25:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:05,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:05,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:05,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:05,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 125 transitions, 1270 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:05,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:05,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:05,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:05,631 INFO L124 PetriNetUnfolderBase]: 1246/2155 cut-off events. [2024-06-20 15:25:05,631 INFO L125 PetriNetUnfolderBase]: For 31338/31338 co-relation queries the response was YES. [2024-06-20 15:25:05,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 2155 events. 1246/2155 cut-off events. For 31338/31338 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12269 event pairs, 386 based on Foata normal form. 3/2155 useless extension candidates. Maximal degree in co-relation 10965. Up to 1841 conditions per place. [2024-06-20 15:25:05,645 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 83 selfloop transitions, 53 changer transitions 0/144 dead transitions. [2024-06-20 15:25:05,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 144 transitions, 1685 flow [2024-06-20 15:25:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:25:05,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:25:05,646 INFO L175 Difference]: Start difference. First operand has 117 places, 125 transitions, 1270 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:25:05,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 144 transitions, 1685 flow [2024-06-20 15:25:05,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 144 transitions, 1612 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-20 15:25:05,685 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1373 flow [2024-06-20 15:25:05,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1373, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-20 15:25:05,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-20 15:25:05,685 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1373 flow [2024-06-20 15:25:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:05,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:05,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:05,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:25:05,685 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:05,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -389282601, now seen corresponding path program 1 times [2024-06-20 15:25:05,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:05,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427075171] [2024-06-20 15:25:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:05,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:05,774 INFO 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 15:25:05,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:05,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427075171] [2024-06-20 15:25:05,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427075171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:05,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:05,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154942967] [2024-06-20 15:25:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:05,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:25:05,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1373 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:05,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:05,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:25:05,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:06,028 INFO L124 PetriNetUnfolderBase]: 1196/2095 cut-off events. [2024-06-20 15:25:06,028 INFO L125 PetriNetUnfolderBase]: For 36022/36027 co-relation queries the response was YES. [2024-06-20 15:25:06,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10905 conditions, 2095 events. 1196/2095 cut-off events. For 36022/36027 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12137 event pairs, 367 based on Foata normal form. 17/2090 useless extension candidates. Maximal degree in co-relation 10846. Up to 1768 conditions per place. [2024-06-20 15:25:06,044 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-20 15:25:06,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 144 transitions, 1689 flow [2024-06-20 15:25:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 15:25:06,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-20 15:25:06,045 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1373 flow. Second operand 5 states and 126 transitions. [2024-06-20 15:25:06,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 144 transitions, 1689 flow [2024-06-20 15:25:06,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 144 transitions, 1535 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:06,086 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1298 flow [2024-06-20 15:25:06,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-06-20 15:25:06,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-20 15:25:06,087 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1298 flow [2024-06-20 15:25:06,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:06,087 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 15:25:06,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:25:06,087 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:06,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1907868594, now seen corresponding path program 1 times [2024-06-20 15:25:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229598915] [2024-06-20 15:25:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:06,168 INFO 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 15:25:06,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:06,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229598915] [2024-06-20 15:25:06,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229598915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:06,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:06,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:06,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494645321] [2024-06-20 15:25:06,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:06,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:06,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:06,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1298 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:06,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:06,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:06,398 INFO L124 PetriNetUnfolderBase]: 1298/2245 cut-off events. [2024-06-20 15:25:06,399 INFO L125 PetriNetUnfolderBase]: For 34833/34833 co-relation queries the response was YES. [2024-06-20 15:25:06,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11677 conditions, 2245 events. 1298/2245 cut-off events. For 34833/34833 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12832 event pairs, 388 based on Foata normal form. 1/2241 useless extension candidates. Maximal degree in co-relation 11617. Up to 1936 conditions per place. [2024-06-20 15:25:06,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 101 selfloop transitions, 50 changer transitions 0/159 dead transitions. [2024-06-20 15:25:06,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 159 transitions, 1857 flow [2024-06-20 15:25:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:25:06,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 15:25:06,415 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1298 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:25:06,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 159 transitions, 1857 flow [2024-06-20 15:25:06,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 159 transitions, 1800 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:06,458 INFO L231 Difference]: Finished difference. Result has 126 places, 138 transitions, 1444 flow [2024-06-20 15:25:06,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=126, PETRI_TRANSITIONS=138} [2024-06-20 15:25:06,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 15:25:06,459 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 138 transitions, 1444 flow [2024-06-20 15:25:06,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:06,459 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 15:25:06,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:25:06,459 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 15:25:06,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 209593462, now seen corresponding path program 2 times [2024-06-20 15:25:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:06,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289943542] [2024-06-20 15:25:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:06,539 INFO 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 15:25:06,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289943542] [2024-06-20 15:25:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289943542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953880784] [2024-06-20 15:25:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:06,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:06,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 138 transitions, 1444 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:06,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:06,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:06,795 INFO L124 PetriNetUnfolderBase]: 1318/2285 cut-off events. [2024-06-20 15:25:06,795 INFO L125 PetriNetUnfolderBase]: For 36910/36910 co-relation queries the response was YES. [2024-06-20 15:25:06,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11996 conditions, 2285 events. 1318/2285 cut-off events. For 36910/36910 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13130 event pairs, 377 based on Foata normal form. 1/2283 useless extension candidates. Maximal degree in co-relation 11935. Up to 2011 conditions per place. [2024-06-20 15:25:06,810 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 33 changer transitions 0/166 dead transitions. [2024-06-20 15:25:06,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1959 flow [2024-06-20 15:25:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:25:06,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:25:06,812 INFO L175 Difference]: Start difference. First operand has 126 places, 138 transitions, 1444 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:25:06,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1959 flow [2024-06-20 15:25:06,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1867 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:06,865 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1589 flow [2024-06-20 15:25:06,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2024-06-20 15:25:06,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-20 15:25:06,866 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1589 flow [2024-06-20 15:25:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:06,867 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 15:25:06,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:25:06,867 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 15:25:06,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:06,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1978846090, now seen corresponding path program 3 times [2024-06-20 15:25:06,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:06,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061600360] [2024-06-20 15:25:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:06,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:06,940 INFO 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 15:25:06,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:06,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061600360] [2024-06-20 15:25:06,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061600360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:06,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:06,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124497476] [2024-06-20 15:25:06,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:06,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:06,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:06,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:06,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1589 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:06,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:06,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:06,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:07,179 INFO L124 PetriNetUnfolderBase]: 1323/2291 cut-off events. [2024-06-20 15:25:07,179 INFO L125 PetriNetUnfolderBase]: For 39428/39428 co-relation queries the response was YES. [2024-06-20 15:25:07,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12015 conditions, 2291 events. 1323/2291 cut-off events. For 39428/39428 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13159 event pairs, 386 based on Foata normal form. 1/2290 useless extension candidates. Maximal degree in co-relation 11953. Up to 1960 conditions per place. [2024-06-20 15:25:07,194 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 53 changer transitions 0/170 dead transitions. [2024-06-20 15:25:07,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 170 transitions, 2111 flow [2024-06-20 15:25:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:25:07,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:07,196 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1589 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:25:07,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 170 transitions, 2111 flow [2024-06-20 15:25:07,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 170 transitions, 2046 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:07,256 INFO L231 Difference]: Finished difference. Result has 134 places, 152 transitions, 1674 flow [2024-06-20 15:25:07,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1674, PETRI_PLACES=134, PETRI_TRANSITIONS=152} [2024-06-20 15:25:07,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-20 15:25:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 152 transitions, 1674 flow [2024-06-20 15:25:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:07,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:07,258 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 15:25:07,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:25:07,258 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 15:25:07,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash 377650042, now seen corresponding path program 4 times [2024-06-20 15:25:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:07,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510277588] [2024-06-20 15:25:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:07,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:07,342 INFO 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 15:25:07,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:07,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510277588] [2024-06-20 15:25:07,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510277588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:07,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:07,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741685253] [2024-06-20 15:25:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:07,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:07,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 152 transitions, 1674 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:07,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:07,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:07,609 INFO L124 PetriNetUnfolderBase]: 1315/2279 cut-off events. [2024-06-20 15:25:07,609 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-20 15:25:07,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12056 conditions, 2279 events. 1315/2279 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13134 event pairs, 386 based on Foata normal form. 2/2279 useless extension candidates. Maximal degree in co-relation 11993. Up to 1952 conditions per place. [2024-06-20 15:25:07,623 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 49 changer transitions 0/166 dead transitions. [2024-06-20 15:25:07,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 166 transitions, 2084 flow [2024-06-20 15:25:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 15:25:07,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:25:07,625 INFO L175 Difference]: Start difference. First operand has 134 places, 152 transitions, 1674 flow. Second operand 6 states and 147 transitions. [2024-06-20 15:25:07,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 166 transitions, 2084 flow [2024-06-20 15:25:07,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 166 transitions, 1965 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:07,693 INFO L231 Difference]: Finished difference. Result has 137 places, 152 transitions, 1661 flow [2024-06-20 15:25:07,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1661, PETRI_PLACES=137, PETRI_TRANSITIONS=152} [2024-06-20 15:25:07,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-20 15:25:07,693 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 152 transitions, 1661 flow [2024-06-20 15:25:07,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:07,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:07,694 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 15:25:07,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:25:07,694 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 15:25:07,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 810453080, now seen corresponding path program 5 times [2024-06-20 15:25:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:07,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324326942] [2024-06-20 15:25:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:07,770 INFO 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 15:25:07,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:07,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324326942] [2024-06-20 15:25:07,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324326942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:07,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:07,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:07,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253585835] [2024-06-20 15:25:07,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:07,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:07,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:07,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:07,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 152 transitions, 1661 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:07,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:07,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:08,026 INFO L124 PetriNetUnfolderBase]: 1309/2266 cut-off events. [2024-06-20 15:25:08,026 INFO L125 PetriNetUnfolderBase]: For 42628/42628 co-relation queries the response was YES. [2024-06-20 15:25:08,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11967 conditions, 2266 events. 1309/2266 cut-off events. For 42628/42628 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13073 event pairs, 397 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 11903. Up to 1913 conditions per place. [2024-06-20 15:25:08,040 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 59 changer transitions 0/168 dead transitions. [2024-06-20 15:25:08,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 168 transitions, 2083 flow [2024-06-20 15:25:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 15:25:08,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-20 15:25:08,041 INFO L175 Difference]: Start difference. First operand has 137 places, 152 transitions, 1661 flow. Second operand 5 states and 132 transitions. [2024-06-20 15:25:08,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 168 transitions, 2083 flow [2024-06-20 15:25:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 1955 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:08,120 INFO L231 Difference]: Finished difference. Result has 137 places, 152 transitions, 1664 flow [2024-06-20 15:25:08,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1664, PETRI_PLACES=137, PETRI_TRANSITIONS=152} [2024-06-20 15:25:08,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-20 15:25:08,121 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 152 transitions, 1664 flow [2024-06-20 15:25:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:08,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:08,121 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 15:25:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:25:08,122 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 15:25:08,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1023355174, now seen corresponding path program 6 times [2024-06-20 15:25:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:08,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173433325] [2024-06-20 15:25:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:08,197 INFO 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 15:25:08,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173433325] [2024-06-20 15:25:08,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173433325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:08,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:08,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:08,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138863299] [2024-06-20 15:25:08,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:08,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:08,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 152 transitions, 1664 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:08,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:08,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:08,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:08,515 INFO L124 PetriNetUnfolderBase]: 1301/2262 cut-off events. [2024-06-20 15:25:08,515 INFO L125 PetriNetUnfolderBase]: For 43353/43353 co-relation queries the response was YES. [2024-06-20 15:25:08,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11914 conditions, 2262 events. 1301/2262 cut-off events. For 43353/43353 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13000 event pairs, 377 based on Foata normal form. 2/2261 useless extension candidates. Maximal degree in co-relation 11849. Up to 1905 conditions per place. [2024-06-20 15:25:08,529 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 70 changer transitions 0/178 dead transitions. [2024-06-20 15:25:08,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 178 transitions, 2070 flow [2024-06-20 15:25:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:25:08,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-20 15:25:08,531 INFO L175 Difference]: Start difference. First operand has 137 places, 152 transitions, 1664 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:25:08,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 178 transitions, 2070 flow [2024-06-20 15:25:08,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 1876 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:08,614 INFO L231 Difference]: Finished difference. Result has 138 places, 152 transitions, 1637 flow [2024-06-20 15:25:08,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1637, PETRI_PLACES=138, PETRI_TRANSITIONS=152} [2024-06-20 15:25:08,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 15:25:08,614 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 152 transitions, 1637 flow [2024-06-20 15:25:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:08,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:08,615 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 15:25:08,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:25:08,615 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 15:25:08,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1970266282, now seen corresponding path program 1 times [2024-06-20 15:25:08,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:08,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272301179] [2024-06-20 15:25:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:08,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:08,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:08,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272301179] [2024-06-20 15:25:08,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272301179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:08,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:08,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105140491] [2024-06-20 15:25:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:08,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:08,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:08,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:08,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 152 transitions, 1637 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:08,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:08,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:08,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:08,944 INFO L124 PetriNetUnfolderBase]: 1309/2276 cut-off events. [2024-06-20 15:25:08,944 INFO L125 PetriNetUnfolderBase]: For 43248/43248 co-relation queries the response was YES. [2024-06-20 15:25:08,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12011 conditions, 2276 events. 1309/2276 cut-off events. For 43248/43248 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13108 event pairs, 341 based on Foata normal form. 2/2277 useless extension candidates. Maximal degree in co-relation 11946. Up to 2019 conditions per place. [2024-06-20 15:25:08,959 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 147 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2024-06-20 15:25:08,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 2157 flow [2024-06-20 15:25:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:25:08,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:25:08,960 INFO L175 Difference]: Start difference. First operand has 138 places, 152 transitions, 1637 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:25:08,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 2157 flow [2024-06-20 15:25:09,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 2005 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:09,042 INFO L231 Difference]: Finished difference. Result has 137 places, 156 transitions, 1614 flow [2024-06-20 15:25:09,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1614, PETRI_PLACES=137, PETRI_TRANSITIONS=156} [2024-06-20 15:25:09,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-20 15:25:09,043 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 156 transitions, 1614 flow [2024-06-20 15:25:09,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:09,043 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 15:25:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:25:09,043 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 15:25:09,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash 728727600, now seen corresponding path program 2 times [2024-06-20 15:25:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:09,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107418721] [2024-06-20 15:25:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:09,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:09,122 INFO 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 15:25:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107418721] [2024-06-20 15:25:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107418721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:09,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:09,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:09,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386415313] [2024-06-20 15:25:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:09,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:09,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:09,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 156 transitions, 1614 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:09,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:09,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:09,373 INFO L124 PetriNetUnfolderBase]: 1317/2299 cut-off events. [2024-06-20 15:25:09,374 INFO L125 PetriNetUnfolderBase]: For 41463/41463 co-relation queries the response was YES. [2024-06-20 15:25:09,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2299 events. 1317/2299 cut-off events. For 41463/41463 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13296 event pairs, 372 based on Foata normal form. 2/2300 useless extension candidates. Maximal degree in co-relation 11906. Up to 2062 conditions per place. [2024-06-20 15:25:09,387 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 147 selfloop transitions, 17 changer transitions 0/172 dead transitions. [2024-06-20 15:25:09,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 172 transitions, 2018 flow [2024-06-20 15:25:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 15:25:09,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 15:25:09,388 INFO L175 Difference]: Start difference. First operand has 137 places, 156 transitions, 1614 flow. Second operand 6 states and 139 transitions. [2024-06-20 15:25:09,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 172 transitions, 2018 flow [2024-06-20 15:25:09,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 172 transitions, 1944 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:09,465 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1625 flow [2024-06-20 15:25:09,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1625, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-20 15:25:09,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-20 15:25:09,465 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1625 flow [2024-06-20 15:25:09,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:09,466 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 15:25:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:25:09,466 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 15:25:09,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1984928720, now seen corresponding path program 3 times [2024-06-20 15:25:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:09,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874788924] [2024-06-20 15:25:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:09,559 INFO 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 15:25:09,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:09,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874788924] [2024-06-20 15:25:09,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874788924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:09,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:09,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:09,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989768691] [2024-06-20 15:25:09,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:09,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:09,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:09,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1625 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:09,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:09,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:09,821 INFO L124 PetriNetUnfolderBase]: 1312/2281 cut-off events. [2024-06-20 15:25:09,821 INFO L125 PetriNetUnfolderBase]: For 42195/42195 co-relation queries the response was YES. [2024-06-20 15:25:09,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11856 conditions, 2281 events. 1312/2281 cut-off events. For 42195/42195 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13148 event pairs, 340 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 11789. Up to 2040 conditions per place. [2024-06-20 15:25:09,836 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 150 selfloop transitions, 16 changer transitions 0/174 dead transitions. [2024-06-20 15:25:09,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 174 transitions, 1997 flow [2024-06-20 15:25:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 15:25:09,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-20 15:25:09,837 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1625 flow. Second operand 5 states and 124 transitions. [2024-06-20 15:25:09,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 174 transitions, 1997 flow [2024-06-20 15:25:09,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 174 transitions, 1924 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:09,928 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1592 flow [2024-06-20 15:25:09,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1592, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2024-06-20 15:25:09,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-20 15:25:09,929 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1592 flow [2024-06-20 15:25:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:09,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:09,930 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 15:25:09,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:25:09,930 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 15:25:09,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1671073924, now seen corresponding path program 1 times [2024-06-20 15:25:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382206398] [2024-06-20 15:25:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:10,010 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 15:25:10,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:10,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382206398] [2024-06-20 15:25:10,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382206398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:10,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:10,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:10,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005646280] [2024-06-20 15:25:10,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:10,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:25:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1592 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:10,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:10,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:25:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:10,300 INFO L124 PetriNetUnfolderBase]: 1255/2222 cut-off events. [2024-06-20 15:25:10,300 INFO L125 PetriNetUnfolderBase]: For 47205/47205 co-relation queries the response was YES. [2024-06-20 15:25:10,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11613 conditions, 2222 events. 1255/2222 cut-off events. For 47205/47205 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12999 event pairs, 271 based on Foata normal form. 7/2210 useless extension candidates. Maximal degree in co-relation 11545. Up to 1794 conditions per place. [2024-06-20 15:25:10,316 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 124 selfloop transitions, 30 changer transitions 1/181 dead transitions. [2024-06-20 15:25:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 181 transitions, 1982 flow [2024-06-20 15:25:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-20 15:25:10,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685 [2024-06-20 15:25:10,318 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1592 flow. Second operand 5 states and 137 transitions. [2024-06-20 15:25:10,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 181 transitions, 1982 flow [2024-06-20 15:25:10,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 181 transitions, 1943 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:10,397 INFO L231 Difference]: Finished difference. Result has 143 places, 159 transitions, 1636 flow [2024-06-20 15:25:10,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1636, PETRI_PLACES=143, PETRI_TRANSITIONS=159} [2024-06-20 15:25:10,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-20 15:25:10,398 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 159 transitions, 1636 flow [2024-06-20 15:25:10,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:10,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:10,398 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 15:25:10,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:25:10,399 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 15:25:10,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash -438413514, now seen corresponding path program 2 times [2024-06-20 15:25:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:10,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5077520] [2024-06-20 15:25:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:10,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:10,487 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 15:25:10,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:10,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5077520] [2024-06-20 15:25:10,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5077520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:10,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:10,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:25:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368412675] [2024-06-20 15:25:10,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:10,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:25:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:25:10,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:25:10,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:25:10,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 159 transitions, 1636 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:10,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:10,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:25:10,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:10,756 INFO L124 PetriNetUnfolderBase]: 1257/2215 cut-off events. [2024-06-20 15:25:10,756 INFO L125 PetriNetUnfolderBase]: For 48046/48051 co-relation queries the response was YES. [2024-06-20 15:25:10,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11645 conditions, 2215 events. 1257/2215 cut-off events. For 48046/48051 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12962 event pairs, 277 based on Foata normal form. 13/2208 useless extension candidates. Maximal degree in co-relation 11576. Up to 1693 conditions per place. [2024-06-20 15:25:10,771 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 129 selfloop transitions, 25 changer transitions 0/180 dead transitions. [2024-06-20 15:25:10,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 180 transitions, 2094 flow [2024-06-20 15:25:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 15:25:10,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-20 15:25:10,772 INFO L175 Difference]: Start difference. First operand has 143 places, 159 transitions, 1636 flow. Second operand 5 states and 131 transitions. [2024-06-20 15:25:10,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 180 transitions, 2094 flow [2024-06-20 15:25:10,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 180 transitions, 2039 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:10,849 INFO L231 Difference]: Finished difference. Result has 145 places, 160 transitions, 1647 flow [2024-06-20 15:25:10,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1647, PETRI_PLACES=145, PETRI_TRANSITIONS=160} [2024-06-20 15:25:10,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-20 15:25:10,850 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 160 transitions, 1647 flow [2024-06-20 15:25:10,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:10,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:10,850 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 15:25:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:25:10,850 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 15:25:10,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1027154146, now seen corresponding path program 1 times [2024-06-20 15:25:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:10,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740918587] [2024-06-20 15:25:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:10,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:10,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740918587] [2024-06-20 15:25:10,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740918587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:10,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:10,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347312148] [2024-06-20 15:25:10,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:10,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:10,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 160 transitions, 1647 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:10,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:10,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:10,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:11,254 INFO L124 PetriNetUnfolderBase]: 1501/2597 cut-off events. [2024-06-20 15:25:11,254 INFO L125 PetriNetUnfolderBase]: For 67027/67027 co-relation queries the response was YES. [2024-06-20 15:25:11,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14260 conditions, 2597 events. 1501/2597 cut-off events. For 67027/67027 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15360 event pairs, 362 based on Foata normal form. 12/2607 useless extension candidates. Maximal degree in co-relation 14190. Up to 1840 conditions per place. [2024-06-20 15:25:11,272 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 56 changer transitions 0/196 dead transitions. [2024-06-20 15:25:11,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2387 flow [2024-06-20 15:25:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:25:11,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:25:11,273 INFO L175 Difference]: Start difference. First operand has 145 places, 160 transitions, 1647 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:25:11,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2387 flow [2024-06-20 15:25:11,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 2344 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:11,418 INFO L231 Difference]: Finished difference. Result has 151 places, 165 transitions, 1814 flow [2024-06-20 15:25:11,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1814, PETRI_PLACES=151, PETRI_TRANSITIONS=165} [2024-06-20 15:25:11,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-20 15:25:11,419 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 165 transitions, 1814 flow [2024-06-20 15:25:11,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:11,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:11,419 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 15:25:11,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:25:11,419 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 15:25:11,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1015949186, now seen corresponding path program 2 times [2024-06-20 15:25:11,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:11,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220221223] [2024-06-20 15:25:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:11,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:11,502 INFO 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 15:25:11,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:11,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220221223] [2024-06-20 15:25:11,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220221223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:11,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:11,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:11,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500909432] [2024-06-20 15:25:11,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:11,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:11,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:11,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:11,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:11,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:11,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 1814 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:11,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:11,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:11,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:11,812 INFO L124 PetriNetUnfolderBase]: 1557/2693 cut-off events. [2024-06-20 15:25:11,813 INFO L125 PetriNetUnfolderBase]: For 75435/75435 co-relation queries the response was YES. [2024-06-20 15:25:11,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 2693 events. 1557/2693 cut-off events. For 75435/75435 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16083 event pairs, 462 based on Foata normal form. 16/2707 useless extension candidates. Maximal degree in co-relation 15065. Up to 2279 conditions per place. [2024-06-20 15:25:11,832 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 53 changer transitions 0/185 dead transitions. [2024-06-20 15:25:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 185 transitions, 2270 flow [2024-06-20 15:25:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:25:11,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:25:11,833 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 1814 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:25:11,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 185 transitions, 2270 flow [2024-06-20 15:25:11,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 185 transitions, 2183 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:11,955 INFO L231 Difference]: Finished difference. Result has 156 places, 167 transitions, 1881 flow [2024-06-20 15:25:11,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1881, PETRI_PLACES=156, PETRI_TRANSITIONS=167} [2024-06-20 15:25:11,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-20 15:25:11,956 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 167 transitions, 1881 flow [2024-06-20 15:25:11,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:11,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:11,956 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 15:25:11,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:25:11,957 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 15:25:11,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1029028096, now seen corresponding path program 3 times [2024-06-20 15:25:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:11,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413890547] [2024-06-20 15:25:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:12,037 INFO 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 15:25:12,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:12,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413890547] [2024-06-20 15:25:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413890547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:12,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:12,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846393705] [2024-06-20 15:25:12,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:12,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:12,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 167 transitions, 1881 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:12,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:12,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:12,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:12,364 INFO L124 PetriNetUnfolderBase]: 1663/2869 cut-off events. [2024-06-20 15:25:12,365 INFO L125 PetriNetUnfolderBase]: For 84893/84893 co-relation queries the response was YES. [2024-06-20 15:25:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16612 conditions, 2869 events. 1663/2869 cut-off events. For 84893/84893 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17393 event pairs, 479 based on Foata normal form. 12/2879 useless extension candidates. Maximal degree in co-relation 16538. Up to 2287 conditions per place. [2024-06-20 15:25:12,386 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 133 selfloop transitions, 52 changer transitions 0/193 dead transitions. [2024-06-20 15:25:12,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 193 transitions, 2485 flow [2024-06-20 15:25:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:25:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:25:12,387 INFO L175 Difference]: Start difference. First operand has 156 places, 167 transitions, 1881 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:25:12,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 193 transitions, 2485 flow [2024-06-20 15:25:12,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 193 transitions, 2359 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:12,541 INFO L231 Difference]: Finished difference. Result has 159 places, 171 transitions, 1963 flow [2024-06-20 15:25:12,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1963, PETRI_PLACES=159, PETRI_TRANSITIONS=171} [2024-06-20 15:25:12,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-20 15:25:12,542 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 171 transitions, 1963 flow [2024-06-20 15:25:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:12,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:12,542 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 15:25:12,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:25:12,543 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 15:25:12,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:12,543 INFO L85 PathProgramCache]: Analyzing trace with hash -645477022, now seen corresponding path program 4 times [2024-06-20 15:25:12,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:12,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162001502] [2024-06-20 15:25:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:12,629 INFO 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 15:25:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:12,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162001502] [2024-06-20 15:25:12,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162001502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:12,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:12,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850906326] [2024-06-20 15:25:12,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:12,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:12,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:12,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 171 transitions, 1963 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:12,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:12,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:12,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:13,001 INFO L124 PetriNetUnfolderBase]: 1795/3076 cut-off events. [2024-06-20 15:25:13,001 INFO L125 PetriNetUnfolderBase]: For 114772/114772 co-relation queries the response was YES. [2024-06-20 15:25:13,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17842 conditions, 3076 events. 1795/3076 cut-off events. For 114772/114772 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18882 event pairs, 541 based on Foata normal form. 42/3115 useless extension candidates. Maximal degree in co-relation 17766. Up to 2493 conditions per place. [2024-06-20 15:25:13,024 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 58 changer transitions 7/192 dead transitions. [2024-06-20 15:25:13,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 192 transitions, 2451 flow [2024-06-20 15:25:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:25:13,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:25:13,025 INFO L175 Difference]: Start difference. First operand has 159 places, 171 transitions, 1963 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:25:13,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 192 transitions, 2451 flow [2024-06-20 15:25:13,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 192 transitions, 2354 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:13,153 INFO L231 Difference]: Finished difference. Result has 162 places, 168 transitions, 1997 flow [2024-06-20 15:25:13,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1997, PETRI_PLACES=162, PETRI_TRANSITIONS=168} [2024-06-20 15:25:13,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-20 15:25:13,153 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 168 transitions, 1997 flow [2024-06-20 15:25:13,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:13,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:13,154 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 15:25:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:25:13,154 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 15:25:13,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash -645480742, now seen corresponding path program 5 times [2024-06-20 15:25:13,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:13,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793856564] [2024-06-20 15:25:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:13,240 INFO 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 15:25:13,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:13,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793856564] [2024-06-20 15:25:13,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793856564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:13,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:13,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682811443] [2024-06-20 15:25:13,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:13,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:13,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:13,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:13,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 168 transitions, 1997 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:13,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:13,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:13,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:13,690 INFO L124 PetriNetUnfolderBase]: 1952/3359 cut-off events. [2024-06-20 15:25:13,690 INFO L125 PetriNetUnfolderBase]: For 136014/136014 co-relation queries the response was YES. [2024-06-20 15:25:13,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20162 conditions, 3359 events. 1952/3359 cut-off events. For 136014/136014 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21090 event pairs, 496 based on Foata normal form. 36/3392 useless extension candidates. Maximal degree in co-relation 20084. Up to 1983 conditions per place. [2024-06-20 15:25:13,713 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 59 changer transitions 10/201 dead transitions. [2024-06-20 15:25:13,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 201 transitions, 2691 flow [2024-06-20 15:25:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 15:25:13,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-06-20 15:25:13,715 INFO L175 Difference]: Start difference. First operand has 162 places, 168 transitions, 1997 flow. Second operand 6 states and 161 transitions. [2024-06-20 15:25:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 201 transitions, 2691 flow [2024-06-20 15:25:13,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 201 transitions, 2547 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:13,882 INFO L231 Difference]: Finished difference. Result has 165 places, 164 transitions, 1995 flow [2024-06-20 15:25:13,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1995, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2024-06-20 15:25:13,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-20 15:25:13,883 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 1995 flow [2024-06-20 15:25:13,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:13,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:13,884 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 15:25:13,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:25:13,884 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 15:25:13,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash -446031082, now seen corresponding path program 6 times [2024-06-20 15:25:13,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:13,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089199701] [2024-06-20 15:25:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:13,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:13,970 INFO 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 15:25:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:13,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089199701] [2024-06-20 15:25:13,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089199701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:13,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:13,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847220453] [2024-06-20 15:25:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:13,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:14,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:14,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 1995 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:14,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:14,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:14,349 INFO L124 PetriNetUnfolderBase]: 1732/2981 cut-off events. [2024-06-20 15:25:14,349 INFO L125 PetriNetUnfolderBase]: For 119403/119403 co-relation queries the response was YES. [2024-06-20 15:25:14,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17569 conditions, 2981 events. 1732/2981 cut-off events. For 119403/119403 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18369 event pairs, 509 based on Foata normal form. 42/3020 useless extension candidates. Maximal degree in co-relation 17489. Up to 2410 conditions per place. [2024-06-20 15:25:14,372 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 55 changer transitions 6/187 dead transitions. [2024-06-20 15:25:14,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 187 transitions, 2486 flow [2024-06-20 15:25:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:25:14,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:25:14,373 INFO L175 Difference]: Start difference. First operand has 165 places, 164 transitions, 1995 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:25:14,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 187 transitions, 2486 flow [2024-06-20 15:25:14,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 187 transitions, 2290 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:14,518 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 1934 flow [2024-06-20 15:25:14,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1934, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2024-06-20 15:25:14,518 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 15:25:14,518 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 1934 flow [2024-06-20 15:25:14,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:14,519 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 15:25:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:25:14,519 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 15:25:14,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash -438406570, now seen corresponding path program 1 times [2024-06-20 15:25:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:14,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241890620] [2024-06-20 15:25:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:14,605 INFO 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 15:25:14,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241890620] [2024-06-20 15:25:14,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241890620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:14,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:14,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:14,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228110756] [2024-06-20 15:25:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:14,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:14,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:14,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:14,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 1934 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:14,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:14,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:15,068 INFO L124 PetriNetUnfolderBase]: 1744/3037 cut-off events. [2024-06-20 15:25:15,068 INFO L125 PetriNetUnfolderBase]: For 110083/110083 co-relation queries the response was YES. [2024-06-20 15:25:15,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16901 conditions, 3037 events. 1744/3037 cut-off events. For 110083/110083 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18925 event pairs, 445 based on Foata normal form. 36/3070 useless extension candidates. Maximal degree in co-relation 16822. Up to 2283 conditions per place. [2024-06-20 15:25:15,093 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 116 selfloop transitions, 58 changer transitions 10/192 dead transitions. [2024-06-20 15:25:15,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 192 transitions, 2457 flow [2024-06-20 15:25:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:25:15,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:25:15,094 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 1934 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:25:15,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 192 transitions, 2457 flow [2024-06-20 15:25:15,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 192 transitions, 2250 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:15,233 INFO L231 Difference]: Finished difference. Result has 167 places, 160 transitions, 1850 flow [2024-06-20 15:25:15,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=167, PETRI_TRANSITIONS=160} [2024-06-20 15:25:15,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-20 15:25:15,234 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 160 transitions, 1850 flow [2024-06-20 15:25:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:15,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:15,234 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 15:25:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:25:15,234 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 15:25:15,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2130994535, now seen corresponding path program 1 times [2024-06-20 15:25:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:15,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529316723] [2024-06-20 15:25:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:15,327 INFO 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 15:25:15,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529316723] [2024-06-20 15:25:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529316723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:15,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618885216] [2024-06-20 15:25:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:15,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:15,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:15,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 160 transitions, 1850 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:15,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:15,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:15,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:15,693 INFO L124 PetriNetUnfolderBase]: 1644/2854 cut-off events. [2024-06-20 15:25:15,693 INFO L125 PetriNetUnfolderBase]: For 82297/82297 co-relation queries the response was YES. [2024-06-20 15:25:15,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16236 conditions, 2854 events. 1644/2854 cut-off events. For 82297/82297 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17439 event pairs, 453 based on Foata normal form. 1/2853 useless extension candidates. Maximal degree in co-relation 16155. Up to 2538 conditions per place. [2024-06-20 15:25:15,716 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 26 changer transitions 0/189 dead transitions. [2024-06-20 15:25:15,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 189 transitions, 2330 flow [2024-06-20 15:25:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:25:15,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:25:15,717 INFO L175 Difference]: Start difference. First operand has 167 places, 160 transitions, 1850 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:25:15,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 189 transitions, 2330 flow [2024-06-20 15:25:15,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 189 transitions, 2159 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:15,890 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 1795 flow [2024-06-20 15:25:15,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1795, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2024-06-20 15:25:15,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 15:25:15,890 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 1795 flow [2024-06-20 15:25:15,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:15,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:15,891 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 15:25:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:25:15,891 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 15:25:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1765370697, now seen corresponding path program 2 times [2024-06-20 15:25:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:15,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992767518] [2024-06-20 15:25:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:15,983 INFO 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 15:25:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992767518] [2024-06-20 15:25:15,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992767518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:15,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:15,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234836363] [2024-06-20 15:25:15,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:15,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:16,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:16,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 1795 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:16,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:16,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:16,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:16,349 INFO L124 PetriNetUnfolderBase]: 1673/2914 cut-off events. [2024-06-20 15:25:16,349 INFO L125 PetriNetUnfolderBase]: For 87798/87798 co-relation queries the response was YES. [2024-06-20 15:25:16,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16789 conditions, 2914 events. 1673/2914 cut-off events. For 87798/87798 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18061 event pairs, 475 based on Foata normal form. 1/2909 useless extension candidates. Maximal degree in co-relation 16710. Up to 2423 conditions per place. [2024-06-20 15:25:16,372 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 75 changer transitions 0/203 dead transitions. [2024-06-20 15:25:16,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 2741 flow [2024-06-20 15:25:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:25:16,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:25:16,373 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 1795 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:25:16,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 2741 flow [2024-06-20 15:25:16,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 203 transitions, 2639 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:16,590 INFO L231 Difference]: Finished difference. Result has 168 places, 177 transitions, 2097 flow [2024-06-20 15:25:16,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2097, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2024-06-20 15:25:16,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-20 15:25:16,591 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 2097 flow [2024-06-20 15:25:16,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:16,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:16,591 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 15:25:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:25:16,591 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 15:25:16,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1105209289, now seen corresponding path program 3 times [2024-06-20 15:25:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738924371] [2024-06-20 15:25:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:16,665 INFO 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 15:25:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738924371] [2024-06-20 15:25:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738924371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:16,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:16,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467414532] [2024-06-20 15:25:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:16,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:16,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:16,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 2097 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:16,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:16,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:16,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:17,088 INFO L124 PetriNetUnfolderBase]: 1678/2915 cut-off events. [2024-06-20 15:25:17,088 INFO L125 PetriNetUnfolderBase]: For 90247/90247 co-relation queries the response was YES. [2024-06-20 15:25:17,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17351 conditions, 2915 events. 1678/2915 cut-off events. For 90247/90247 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18031 event pairs, 467 based on Foata normal form. 1/2910 useless extension candidates. Maximal degree in co-relation 17271. Up to 2427 conditions per place. [2024-06-20 15:25:17,113 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 77 changer transitions 0/203 dead transitions. [2024-06-20 15:25:17,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 203 transitions, 2865 flow [2024-06-20 15:25:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:25:17,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:25:17,114 INFO L175 Difference]: Start difference. First operand has 168 places, 177 transitions, 2097 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:25:17,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 203 transitions, 2865 flow [2024-06-20 15:25:17,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 203 transitions, 2708 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-06-20 15:25:17,339 INFO L231 Difference]: Finished difference. Result has 174 places, 180 transitions, 2164 flow [2024-06-20 15:25:17,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2164, PETRI_PLACES=174, PETRI_TRANSITIONS=180} [2024-06-20 15:25:17,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-20 15:25:17,340 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 180 transitions, 2164 flow [2024-06-20 15:25:17,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:17,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:17,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:17,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:25:17,341 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 15:25:17,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2027613709, now seen corresponding path program 4 times [2024-06-20 15:25:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:17,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788825748] [2024-06-20 15:25:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:17,441 INFO 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 15:25:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788825748] [2024-06-20 15:25:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788825748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781617753] [2024-06-20 15:25:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:17,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:17,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:17,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 180 transitions, 2164 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:17,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:17,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:17,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:17,815 INFO L124 PetriNetUnfolderBase]: 1683/2934 cut-off events. [2024-06-20 15:25:17,815 INFO L125 PetriNetUnfolderBase]: For 91161/91161 co-relation queries the response was YES. [2024-06-20 15:25:17,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17158 conditions, 2934 events. 1683/2934 cut-off events. For 91161/91161 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18179 event pairs, 457 based on Foata normal form. 1/2933 useless extension candidates. Maximal degree in co-relation 17075. Up to 2598 conditions per place. [2024-06-20 15:25:17,841 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 167 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2024-06-20 15:25:17,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 201 transitions, 2642 flow [2024-06-20 15:25:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:25:17,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:25:17,843 INFO L175 Difference]: Start difference. First operand has 174 places, 180 transitions, 2164 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:25:17,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 201 transitions, 2642 flow [2024-06-20 15:25:18,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 201 transitions, 2486 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:18,011 INFO L231 Difference]: Finished difference. Result has 177 places, 183 transitions, 2114 flow [2024-06-20 15:25:18,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2114, PETRI_PLACES=177, PETRI_TRANSITIONS=183} [2024-06-20 15:25:18,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-20 15:25:18,011 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 183 transitions, 2114 flow [2024-06-20 15:25:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:18,012 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 15:25:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:25:18,012 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 15:25:18,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash -727912971, now seen corresponding path program 1 times [2024-06-20 15:25:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245663741] [2024-06-20 15:25:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:18,099 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 15:25:18,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245663741] [2024-06-20 15:25:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245663741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:18,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:18,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:18,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231358792] [2024-06-20 15:25:18,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:18,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:18,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:18,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:18,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 183 transitions, 2114 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:18,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:18,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:18,520 INFO L124 PetriNetUnfolderBase]: 1763/3040 cut-off events. [2024-06-20 15:25:18,520 INFO L125 PetriNetUnfolderBase]: For 109586/109586 co-relation queries the response was YES. [2024-06-20 15:25:18,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18419 conditions, 3040 events. 1763/3040 cut-off events. For 109586/109586 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18820 event pairs, 476 based on Foata normal form. 2/3029 useless extension candidates. Maximal degree in co-relation 18335. Up to 2566 conditions per place. [2024-06-20 15:25:18,547 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 146 selfloop transitions, 64 changer transitions 0/218 dead transitions. [2024-06-20 15:25:18,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 218 transitions, 2825 flow [2024-06-20 15:25:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:25:18,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-20 15:25:18,548 INFO L175 Difference]: Start difference. First operand has 177 places, 183 transitions, 2114 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:25:18,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 218 transitions, 2825 flow [2024-06-20 15:25:18,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 218 transitions, 2753 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:18,738 INFO L231 Difference]: Finished difference. Result has 180 places, 189 transitions, 2305 flow [2024-06-20 15:25:18,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2305, PETRI_PLACES=180, PETRI_TRANSITIONS=189} [2024-06-20 15:25:18,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-20 15:25:18,739 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 189 transitions, 2305 flow [2024-06-20 15:25:18,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:18,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:18,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:25:18,739 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 15:25:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 550105849, now seen corresponding path program 2 times [2024-06-20 15:25:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104183825] [2024-06-20 15:25:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:18,821 INFO 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 15:25:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104183825] [2024-06-20 15:25:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104183825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:18,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:18,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:18,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585016596] [2024-06-20 15:25:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:18,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:18,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:18,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:18,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 189 transitions, 2305 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:18,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:18,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:19,200 INFO L124 PetriNetUnfolderBase]: 1758/3044 cut-off events. [2024-06-20 15:25:19,200 INFO L125 PetriNetUnfolderBase]: For 112532/112532 co-relation queries the response was YES. [2024-06-20 15:25:19,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18693 conditions, 3044 events. 1758/3044 cut-off events. For 112532/112532 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18874 event pairs, 488 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 18607. Up to 2649 conditions per place. [2024-06-20 15:25:19,228 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 59 changer transitions 0/210 dead transitions. [2024-06-20 15:25:19,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 210 transitions, 2761 flow [2024-06-20 15:25:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:25:19,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:25:19,229 INFO L175 Difference]: Start difference. First operand has 180 places, 189 transitions, 2305 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:25:19,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 210 transitions, 2761 flow [2024-06-20 15:25:19,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 210 transitions, 2623 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:19,423 INFO L231 Difference]: Finished difference. Result has 183 places, 189 transitions, 2290 flow [2024-06-20 15:25:19,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2290, PETRI_PLACES=183, PETRI_TRANSITIONS=189} [2024-06-20 15:25:19,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-20 15:25:19,424 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 189 transitions, 2290 flow [2024-06-20 15:25:19,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:19,424 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 15:25:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:25:19,425 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 15:25:19,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash -444125707, now seen corresponding path program 3 times [2024-06-20 15:25:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259017925] [2024-06-20 15:25:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:19,516 INFO 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 15:25:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259017925] [2024-06-20 15:25:19,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259017925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:19,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:19,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:19,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193703022] [2024-06-20 15:25:19,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:19,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:19,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:19,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:19,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 189 transitions, 2290 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:19,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:19,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:19,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:19,963 INFO L124 PetriNetUnfolderBase]: 1766/3061 cut-off events. [2024-06-20 15:25:19,963 INFO L125 PetriNetUnfolderBase]: For 116701/116701 co-relation queries the response was YES. [2024-06-20 15:25:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18807 conditions, 3061 events. 1766/3061 cut-off events. For 116701/116701 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18963 event pairs, 476 based on Foata normal form. 2/3059 useless extension candidates. Maximal degree in co-relation 18720. Up to 2720 conditions per place. [2024-06-20 15:25:19,988 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 177 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2024-06-20 15:25:19,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 210 transitions, 2790 flow [2024-06-20 15:25:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:25:19,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:25:19,989 INFO L175 Difference]: Start difference. First operand has 183 places, 189 transitions, 2290 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:25:19,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 210 transitions, 2790 flow [2024-06-20 15:25:20,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 210 transitions, 2651 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:20,210 INFO L231 Difference]: Finished difference. Result has 185 places, 191 transitions, 2254 flow [2024-06-20 15:25:20,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2254, PETRI_PLACES=185, PETRI_TRANSITIONS=191} [2024-06-20 15:25:20,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-20 15:25:20,211 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 191 transitions, 2254 flow [2024-06-20 15:25:20,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:20,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:20,212 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 15:25:20,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:25:20,212 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 15:25:20,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2112212271, now seen corresponding path program 5 times [2024-06-20 15:25:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:20,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227005025] [2024-06-20 15:25:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:20,283 INFO 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 15:25:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:20,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227005025] [2024-06-20 15:25:20,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227005025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:20,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:20,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:20,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556915336] [2024-06-20 15:25:20,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:20,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:20,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:20,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 191 transitions, 2254 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:20,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:20,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:20,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:20,669 INFO L124 PetriNetUnfolderBase]: 1771/3063 cut-off events. [2024-06-20 15:25:20,669 INFO L125 PetriNetUnfolderBase]: For 120183/120183 co-relation queries the response was YES. [2024-06-20 15:25:20,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18850 conditions, 3063 events. 1771/3063 cut-off events. For 120183/120183 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19076 event pairs, 496 based on Foata normal form. 1/3061 useless extension candidates. Maximal degree in co-relation 18762. Up to 2560 conditions per place. [2024-06-20 15:25:20,697 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 74 changer transitions 0/216 dead transitions. [2024-06-20 15:25:20,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 216 transitions, 2968 flow [2024-06-20 15:25:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:25:20,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:25:20,698 INFO L175 Difference]: Start difference. First operand has 185 places, 191 transitions, 2254 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:25:20,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 216 transitions, 2968 flow [2024-06-20 15:25:20,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 216 transitions, 2895 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:20,927 INFO L231 Difference]: Finished difference. Result has 187 places, 194 transitions, 2387 flow [2024-06-20 15:25:20,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2387, PETRI_PLACES=187, PETRI_TRANSITIONS=194} [2024-06-20 15:25:20,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-20 15:25:20,928 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 194 transitions, 2387 flow [2024-06-20 15:25:20,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:20,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:20,928 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 15:25:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:25:20,928 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 15:25:20,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 999432917, now seen corresponding path program 6 times [2024-06-20 15:25:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:20,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917090118] [2024-06-20 15:25:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:21,000 INFO 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 15:25:21,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:21,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917090118] [2024-06-20 15:25:21,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917090118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:21,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:21,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:21,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063468970] [2024-06-20 15:25:21,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:21,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:21,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:21,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 194 transitions, 2387 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:21,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:21,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:21,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:21,387 INFO L124 PetriNetUnfolderBase]: 1776/3084 cut-off events. [2024-06-20 15:25:21,388 INFO L125 PetriNetUnfolderBase]: For 124615/124615 co-relation queries the response was YES. [2024-06-20 15:25:21,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19141 conditions, 3084 events. 1776/3084 cut-off events. For 124615/124615 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19295 event pairs, 506 based on Foata normal form. 1/3082 useless extension candidates. Maximal degree in co-relation 19052. Up to 2564 conditions per place. [2024-06-20 15:25:21,506 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-20 15:25:21,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 216 transitions, 3103 flow [2024-06-20 15:25:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:25:21,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:25:21,507 INFO L175 Difference]: Start difference. First operand has 187 places, 194 transitions, 2387 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:25:21,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 216 transitions, 3103 flow [2024-06-20 15:25:21,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 216 transitions, 2845 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:21,716 INFO L231 Difference]: Finished difference. Result has 188 places, 197 transitions, 2343 flow [2024-06-20 15:25:21,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2343, PETRI_PLACES=188, PETRI_TRANSITIONS=197} [2024-06-20 15:25:21,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-20 15:25:21,716 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 197 transitions, 2343 flow [2024-06-20 15:25:21,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:21,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:21,717 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 15:25:21,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:25:21,717 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 15:25:21,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash 218987823, now seen corresponding path program 7 times [2024-06-20 15:25:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:21,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625305178] [2024-06-20 15:25:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:21,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:21,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625305178] [2024-06-20 15:25:21,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625305178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:21,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:21,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:21,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567089852] [2024-06-20 15:25:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:21,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:21,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:21,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:21,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 197 transitions, 2343 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:21,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:21,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:22,181 INFO L124 PetriNetUnfolderBase]: 1794/3103 cut-off events. [2024-06-20 15:25:22,181 INFO L125 PetriNetUnfolderBase]: For 131756/131756 co-relation queries the response was YES. [2024-06-20 15:25:22,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19252 conditions, 3103 events. 1794/3103 cut-off events. For 131756/131756 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19377 event pairs, 497 based on Foata normal form. 2/3102 useless extension candidates. Maximal degree in co-relation 19164. Up to 2583 conditions per place. [2024-06-20 15:25:22,207 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 77 changer transitions 0/220 dead transitions. [2024-06-20 15:25:22,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 220 transitions, 3107 flow [2024-06-20 15:25:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:25:22,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:25:22,208 INFO L175 Difference]: Start difference. First operand has 188 places, 197 transitions, 2343 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:25:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 220 transitions, 3107 flow [2024-06-20 15:25:22,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 220 transitions, 2948 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:22,478 INFO L231 Difference]: Finished difference. Result has 191 places, 204 transitions, 2449 flow [2024-06-20 15:25:22,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=191, PETRI_TRANSITIONS=204} [2024-06-20 15:25:22,478 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-20 15:25:22,478 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 204 transitions, 2449 flow [2024-06-20 15:25:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:22,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:22,478 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 15:25:22,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:25:22,478 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 15:25:22,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash -654946761, now seen corresponding path program 8 times [2024-06-20 15:25:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:22,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708308357] [2024-06-20 15:25:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:22,564 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 15:25:22,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708308357] [2024-06-20 15:25:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708308357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:22,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:22,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:22,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938383984] [2024-06-20 15:25:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:22,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:22,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:22,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 204 transitions, 2449 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:22,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:22,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:22,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:22,963 INFO L124 PetriNetUnfolderBase]: 1788/3104 cut-off events. [2024-06-20 15:25:22,963 INFO L125 PetriNetUnfolderBase]: For 133606/133606 co-relation queries the response was YES. [2024-06-20 15:25:22,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19194 conditions, 3104 events. 1788/3104 cut-off events. For 133606/133606 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19346 event pairs, 478 based on Foata normal form. 2/3104 useless extension candidates. Maximal degree in co-relation 19105. Up to 2640 conditions per place. [2024-06-20 15:25:22,989 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 67 changer transitions 0/236 dead transitions. [2024-06-20 15:25:22,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 236 transitions, 3189 flow [2024-06-20 15:25:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:25:22,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-20 15:25:22,990 INFO L175 Difference]: Start difference. First operand has 191 places, 204 transitions, 2449 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:25:22,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 236 transitions, 3189 flow [2024-06-20 15:25:23,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 236 transitions, 3051 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:23,292 INFO L231 Difference]: Finished difference. Result has 196 places, 204 transitions, 2460 flow [2024-06-20 15:25:23,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2460, PETRI_PLACES=196, PETRI_TRANSITIONS=204} [2024-06-20 15:25:23,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 15:25:23,293 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 204 transitions, 2460 flow [2024-06-20 15:25:23,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:23,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:23,293 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 15:25:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:25:23,293 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 15:25:23,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1456342583, now seen corresponding path program 9 times [2024-06-20 15:25:23,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:23,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042020819] [2024-06-20 15:25:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:23,402 INFO 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 15:25:23,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042020819] [2024-06-20 15:25:23,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042020819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:23,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:23,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18822834] [2024-06-20 15:25:23,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:23,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:23,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:23,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 204 transitions, 2460 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:23,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:23,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:23,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:23,845 INFO L124 PetriNetUnfolderBase]: 1782/3087 cut-off events. [2024-06-20 15:25:23,845 INFO L125 PetriNetUnfolderBase]: For 135870/135870 co-relation queries the response was YES. [2024-06-20 15:25:23,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19087 conditions, 3087 events. 1782/3087 cut-off events. For 135870/135870 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19217 event pairs, 498 based on Foata normal form. 2/3086 useless extension candidates. Maximal degree in co-relation 18997. Up to 2635 conditions per place. [2024-06-20 15:25:23,874 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 159 selfloop transitions, 57 changer transitions 0/224 dead transitions. [2024-06-20 15:25:23,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 224 transitions, 3046 flow [2024-06-20 15:25:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:25:23,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:25:23,875 INFO L175 Difference]: Start difference. First operand has 196 places, 204 transitions, 2460 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:25:23,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 224 transitions, 3046 flow [2024-06-20 15:25:24,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 224 transitions, 2819 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 15:25:24,154 INFO L231 Difference]: Finished difference. Result has 193 places, 204 transitions, 2362 flow [2024-06-20 15:25:24,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2362, PETRI_PLACES=193, PETRI_TRANSITIONS=204} [2024-06-20 15:25:24,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-20 15:25:24,154 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 204 transitions, 2362 flow [2024-06-20 15:25:24,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:24,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:24,155 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 15:25:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:25:24,155 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 15:25:24,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash 996582901, now seen corresponding path program 4 times [2024-06-20 15:25:24,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:24,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668039545] [2024-06-20 15:25:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:24,249 INFO 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 15:25:24,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668039545] [2024-06-20 15:25:24,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668039545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:24,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:24,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818916563] [2024-06-20 15:25:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:24,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:24,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 204 transitions, 2362 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:24,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:24,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:24,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:24,698 INFO L124 PetriNetUnfolderBase]: 1908/3304 cut-off events. [2024-06-20 15:25:24,698 INFO L125 PetriNetUnfolderBase]: For 159366/159366 co-relation queries the response was YES. [2024-06-20 15:25:24,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21272 conditions, 3304 events. 1908/3304 cut-off events. For 159366/159366 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20864 event pairs, 526 based on Foata normal form. 2/3303 useless extension candidates. Maximal degree in co-relation 21182. Up to 2734 conditions per place. [2024-06-20 15:25:24,727 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 59 changer transitions 0/236 dead transitions. [2024-06-20 15:25:24,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 3125 flow [2024-06-20 15:25:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:25:24,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:24,729 INFO L175 Difference]: Start difference. First operand has 193 places, 204 transitions, 2362 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:25:24,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 3125 flow [2024-06-20 15:25:25,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 236 transitions, 2978 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:25,019 INFO L231 Difference]: Finished difference. Result has 194 places, 210 transitions, 2483 flow [2024-06-20 15:25:25,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=194, PETRI_TRANSITIONS=210} [2024-06-20 15:25:25,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-20 15:25:25,019 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 210 transitions, 2483 flow [2024-06-20 15:25:25,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:25,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:25,020 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 15:25:25,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:25:25,020 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 15:25:25,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2121742415, now seen corresponding path program 5 times [2024-06-20 15:25:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:25,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978778739] [2024-06-20 15:25:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:25,109 INFO 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 15:25:25,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978778739] [2024-06-20 15:25:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978778739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:25,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:25,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:25,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507052486] [2024-06-20 15:25:25,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:25,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:25,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:25,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:25,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 210 transitions, 2483 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:25,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:25,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:25,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:25,519 INFO L124 PetriNetUnfolderBase]: 1916/3322 cut-off events. [2024-06-20 15:25:25,519 INFO L125 PetriNetUnfolderBase]: For 160290/160290 co-relation queries the response was YES. [2024-06-20 15:25:25,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21623 conditions, 3322 events. 1916/3322 cut-off events. For 160290/160290 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21068 event pairs, 534 based on Foata normal form. 2/3322 useless extension candidates. Maximal degree in co-relation 21532. Up to 2886 conditions per place. [2024-06-20 15:25:25,548 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 54 changer transitions 0/230 dead transitions. [2024-06-20 15:25:25,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 230 transitions, 3017 flow [2024-06-20 15:25:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:25:25,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:25:25,550 INFO L175 Difference]: Start difference. First operand has 194 places, 210 transitions, 2483 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:25:25,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 230 transitions, 3017 flow [2024-06-20 15:25:25,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 230 transitions, 2870 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:25,888 INFO L231 Difference]: Finished difference. Result has 197 places, 212 transitions, 2499 flow [2024-06-20 15:25:25,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2499, PETRI_PLACES=197, PETRI_TRANSITIONS=212} [2024-06-20 15:25:25,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-20 15:25:25,889 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 212 transitions, 2499 flow [2024-06-20 15:25:25,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:25,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:25,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:25:25,889 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 15:25:25,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1765566543, now seen corresponding path program 6 times [2024-06-20 15:25:25,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:25,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770031725] [2024-06-20 15:25:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:25,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:25,991 INFO 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 15:25:25,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:25,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770031725] [2024-06-20 15:25:25,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770031725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:25,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:25,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:25,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372387444] [2024-06-20 15:25:25,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:25,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:25,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:25,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:25,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:26,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 212 transitions, 2499 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:26,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:26,446 INFO L124 PetriNetUnfolderBase]: 1924/3330 cut-off events. [2024-06-20 15:25:26,446 INFO L125 PetriNetUnfolderBase]: For 165349/165349 co-relation queries the response was YES. [2024-06-20 15:25:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21647 conditions, 3330 events. 1924/3330 cut-off events. For 165349/165349 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20981 event pairs, 406 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 21555. Up to 1941 conditions per place. [2024-06-20 15:25:26,478 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 159 selfloop transitions, 78 changer transitions 0/245 dead transitions. [2024-06-20 15:25:26,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 245 transitions, 3338 flow [2024-06-20 15:25:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:25:26,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-20 15:25:26,479 INFO L175 Difference]: Start difference. First operand has 197 places, 212 transitions, 2499 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:25:26,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 245 transitions, 3338 flow [2024-06-20 15:25:26,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 245 transitions, 3211 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:26,854 INFO L231 Difference]: Finished difference. Result has 199 places, 214 transitions, 2570 flow [2024-06-20 15:25:26,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2570, PETRI_PLACES=199, PETRI_TRANSITIONS=214} [2024-06-20 15:25:26,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-20 15:25:26,855 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 214 transitions, 2570 flow [2024-06-20 15:25:26,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:26,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:26,855 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 15:25:26,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:25:26,856 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 15:25:26,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1776994383, now seen corresponding path program 7 times [2024-06-20 15:25:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471996433] [2024-06-20 15:25:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:26,941 INFO 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 15:25:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471996433] [2024-06-20 15:25:26,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471996433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:26,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:26,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:26,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344124636] [2024-06-20 15:25:26,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:26,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:26,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:26,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:26,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 214 transitions, 2570 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:26,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:26,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:26,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:27,413 INFO L124 PetriNetUnfolderBase]: 1899/3283 cut-off events. [2024-06-20 15:25:27,413 INFO L125 PetriNetUnfolderBase]: For 170428/170428 co-relation queries the response was YES. [2024-06-20 15:25:27,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21509 conditions, 3283 events. 1899/3283 cut-off events. For 170428/170428 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20666 event pairs, 444 based on Foata normal form. 8/3289 useless extension candidates. Maximal degree in co-relation 21416. Up to 1927 conditions per place. [2024-06-20 15:25:27,445 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 164 selfloop transitions, 70 changer transitions 0/242 dead transitions. [2024-06-20 15:25:27,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 242 transitions, 3248 flow [2024-06-20 15:25:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:25:27,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:25:27,447 INFO L175 Difference]: Start difference. First operand has 199 places, 214 transitions, 2570 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:25:27,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 242 transitions, 3248 flow [2024-06-20 15:25:27,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 242 transitions, 3024 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:27,785 INFO L231 Difference]: Finished difference. Result has 200 places, 214 transitions, 2492 flow [2024-06-20 15:25:27,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2492, PETRI_PLACES=200, PETRI_TRANSITIONS=214} [2024-06-20 15:25:27,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-20 15:25:27,786 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 214 transitions, 2492 flow [2024-06-20 15:25:27,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:27,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:27,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:27,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:25:27,786 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 15:25:27,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash -894736907, now seen corresponding path program 8 times [2024-06-20 15:25:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:27,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356104485] [2024-06-20 15:25:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:27,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:27,862 INFO 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 15:25:27,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356104485] [2024-06-20 15:25:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356104485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:27,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:27,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:27,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194687009] [2024-06-20 15:25:27,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:27,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:27,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:27,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:27,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:27,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 214 transitions, 2492 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:27,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:27,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:27,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:28,296 INFO L124 PetriNetUnfolderBase]: 1876/3262 cut-off events. [2024-06-20 15:25:28,296 INFO L125 PetriNetUnfolderBase]: For 162406/162406 co-relation queries the response was YES. [2024-06-20 15:25:28,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20482 conditions, 3262 events. 1876/3262 cut-off events. For 162406/162406 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20647 event pairs, 498 based on Foata normal form. 10/3270 useless extension candidates. Maximal degree in co-relation 20390. Up to 2558 conditions per place. [2024-06-20 15:25:28,327 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 174 selfloop transitions, 55 changer transitions 0/237 dead transitions. [2024-06-20 15:25:28,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 237 transitions, 3158 flow [2024-06-20 15:25:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:25:28,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:25:28,330 INFO L175 Difference]: Start difference. First operand has 200 places, 214 transitions, 2492 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:25:28,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 237 transitions, 3158 flow [2024-06-20 15:25:28,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 237 transitions, 3000 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:28,744 INFO L231 Difference]: Finished difference. Result has 201 places, 214 transitions, 2451 flow [2024-06-20 15:25:28,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2451, PETRI_PLACES=201, PETRI_TRANSITIONS=214} [2024-06-20 15:25:28,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-20 15:25:28,744 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 214 transitions, 2451 flow [2024-06-20 15:25:28,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:28,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:28,745 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 15:25:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:25:28,745 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 15:25:28,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash 218994767, now seen corresponding path program 9 times [2024-06-20 15:25:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30766003] [2024-06-20 15:25:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:28,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:28,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30766003] [2024-06-20 15:25:28,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30766003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:28,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:28,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799160133] [2024-06-20 15:25:28,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:28,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:28,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 214 transitions, 2451 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:28,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:28,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:28,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:29,313 INFO L124 PetriNetUnfolderBase]: 1846/3216 cut-off events. [2024-06-20 15:25:29,314 INFO L125 PetriNetUnfolderBase]: For 151216/151216 co-relation queries the response was YES. [2024-06-20 15:25:29,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3216 events. 1846/3216 cut-off events. For 151216/151216 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20395 event pairs, 504 based on Foata normal form. 10/3224 useless extension candidates. Maximal degree in co-relation 19428. Up to 2748 conditions per place. [2024-06-20 15:25:29,344 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 174 selfloop transitions, 50 changer transitions 0/232 dead transitions. [2024-06-20 15:25:29,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 232 transitions, 2965 flow [2024-06-20 15:25:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:25:29,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:25:29,345 INFO L175 Difference]: Start difference. First operand has 201 places, 214 transitions, 2451 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:25:29,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 232 transitions, 2965 flow [2024-06-20 15:25:29,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 232 transitions, 2850 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:29,810 INFO L231 Difference]: Finished difference. Result has 204 places, 214 transitions, 2442 flow [2024-06-20 15:25:29,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2442, PETRI_PLACES=204, PETRI_TRANSITIONS=214} [2024-06-20 15:25:29,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-20 15:25:29,811 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 214 transitions, 2442 flow [2024-06-20 15:25:29,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:29,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:29,811 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 15:25:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:25:29,811 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 15:25:29,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash -787481231, now seen corresponding path program 10 times [2024-06-20 15:25:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:29,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671292543] [2024-06-20 15:25:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:29,896 INFO 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 15:25:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671292543] [2024-06-20 15:25:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671292543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:29,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:29,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:29,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3332486] [2024-06-20 15:25:29,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:29,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:29,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:29,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:29,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 214 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:29,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:30,363 INFO L124 PetriNetUnfolderBase]: 1823/3180 cut-off events. [2024-06-20 15:25:30,363 INFO L125 PetriNetUnfolderBase]: For 139065/139065 co-relation queries the response was YES. [2024-06-20 15:25:30,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18655 conditions, 3180 events. 1823/3180 cut-off events. For 139065/139065 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20127 event pairs, 474 based on Foata normal form. 10/3186 useless extension candidates. Maximal degree in co-relation 18561. Up to 2589 conditions per place. [2024-06-20 15:25:30,390 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 184 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-06-20 15:25:30,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 250 transitions, 3048 flow [2024-06-20 15:25:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:25:30,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-20 15:25:30,391 INFO L175 Difference]: Start difference. First operand has 204 places, 214 transitions, 2442 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:25:30,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 250 transitions, 3048 flow [2024-06-20 15:25:30,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 250 transitions, 2896 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:30,713 INFO L231 Difference]: Finished difference. Result has 205 places, 214 transitions, 2421 flow [2024-06-20 15:25:30,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2421, PETRI_PLACES=205, PETRI_TRANSITIONS=214} [2024-06-20 15:25:30,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 15:25:30,714 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 214 transitions, 2421 flow [2024-06-20 15:25:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:30,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:30,714 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 15:25:30,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:25:30,715 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 15:25:30,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash -559580081, now seen corresponding path program 11 times [2024-06-20 15:25:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421431841] [2024-06-20 15:25:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:30,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:30,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421431841] [2024-06-20 15:25:30,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421431841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:30,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:30,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:30,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216747415] [2024-06-20 15:25:30,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:30,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:30,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:30,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:30,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 214 transitions, 2421 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:30,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:30,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:30,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:31,257 INFO L124 PetriNetUnfolderBase]: 1800/3140 cut-off events. [2024-06-20 15:25:31,257 INFO L125 PetriNetUnfolderBase]: For 125510/125510 co-relation queries the response was YES. [2024-06-20 15:25:31,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 3140 events. 1800/3140 cut-off events. For 125510/125510 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19913 event pairs, 489 based on Foata normal form. 10/3147 useless extension candidates. Maximal degree in co-relation 17756. Up to 2654 conditions per place. [2024-06-20 15:25:31,280 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 181 selfloop transitions, 48 changer transitions 0/237 dead transitions. [2024-06-20 15:25:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 237 transitions, 2959 flow [2024-06-20 15:25:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:25:31,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541666666666667 [2024-06-20 15:25:31,281 INFO L175 Difference]: Start difference. First operand has 205 places, 214 transitions, 2421 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:25:31,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 237 transitions, 2959 flow [2024-06-20 15:25:31,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 237 transitions, 2838 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:31,644 INFO L231 Difference]: Finished difference. Result has 205 places, 214 transitions, 2405 flow [2024-06-20 15:25:31,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2405, PETRI_PLACES=205, PETRI_TRANSITIONS=214} [2024-06-20 15:25:31,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 15:25:31,645 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 214 transitions, 2405 flow [2024-06-20 15:25:31,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:31,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:31,645 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 15:25:31,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:25:31,646 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 15:25:31,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:31,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1456588537, now seen corresponding path program 12 times [2024-06-20 15:25:31,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:31,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091898385] [2024-06-20 15:25:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:31,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:31,726 INFO 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 15:25:31,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091898385] [2024-06-20 15:25:31,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091898385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:31,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:31,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:31,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93911817] [2024-06-20 15:25:31,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:31,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:31,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:31,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:31,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:31,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 214 transitions, 2405 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:31,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:31,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:31,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:32,153 INFO L124 PetriNetUnfolderBase]: 1770/3089 cut-off events. [2024-06-20 15:25:32,153 INFO L125 PetriNetUnfolderBase]: For 108289/108289 co-relation queries the response was YES. [2024-06-20 15:25:32,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16926 conditions, 3089 events. 1770/3089 cut-off events. For 108289/108289 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19543 event pairs, 376 based on Foata normal form. 10/3096 useless extension candidates. Maximal degree in co-relation 16830. Up to 2139 conditions per place. [2024-06-20 15:25:32,179 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 60 changer transitions 0/243 dead transitions. [2024-06-20 15:25:32,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 243 transitions, 3001 flow [2024-06-20 15:25:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-20 15:25:32,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-20 15:25:32,180 INFO L175 Difference]: Start difference. First operand has 205 places, 214 transitions, 2405 flow. Second operand 6 states and 162 transitions. [2024-06-20 15:25:32,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 243 transitions, 3001 flow [2024-06-20 15:25:32,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 243 transitions, 2882 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:32,503 INFO L231 Difference]: Finished difference. Result has 206 places, 214 transitions, 2417 flow [2024-06-20 15:25:32,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2417, PETRI_PLACES=206, PETRI_TRANSITIONS=214} [2024-06-20 15:25:32,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 15:25:32,504 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 214 transitions, 2417 flow [2024-06-20 15:25:32,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:32,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:32,504 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 15:25:32,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:25:32,505 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 15:25:32,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1636320359, now seen corresponding path program 1 times [2024-06-20 15:25:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:32,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786513632] [2024-06-20 15:25:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:32,580 INFO 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 15:25:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786513632] [2024-06-20 15:25:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786513632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:32,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:32,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236103537] [2024-06-20 15:25:32,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:32,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:32,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 214 transitions, 2417 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:32,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:32,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:32,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:32,963 INFO L124 PetriNetUnfolderBase]: 1775/3098 cut-off events. [2024-06-20 15:25:32,963 INFO L125 PetriNetUnfolderBase]: For 97263/97263 co-relation queries the response was YES. [2024-06-20 15:25:32,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 3098 events. 1775/3098 cut-off events. For 97263/97263 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19594 event pairs, 483 based on Foata normal form. 1/3096 useless extension candidates. Maximal degree in co-relation 17017. Up to 2640 conditions per place. [2024-06-20 15:25:32,989 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 61 changer transitions 0/230 dead transitions. [2024-06-20 15:25:32,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 230 transitions, 2929 flow [2024-06-20 15:25:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:25:32,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:32,990 INFO L175 Difference]: Start difference. First operand has 206 places, 214 transitions, 2417 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:25:32,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 230 transitions, 2929 flow [2024-06-20 15:25:33,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 230 transitions, 2725 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:33,330 INFO L231 Difference]: Finished difference. Result has 205 places, 217 transitions, 2391 flow [2024-06-20 15:25:33,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2391, PETRI_PLACES=205, PETRI_TRANSITIONS=217} [2024-06-20 15:25:33,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 15:25:33,331 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 217 transitions, 2391 flow [2024-06-20 15:25:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:33,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:33,331 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 15:25:33,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:25:33,331 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 15:25:33,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1716249121, now seen corresponding path program 2 times [2024-06-20 15:25:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:33,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053978043] [2024-06-20 15:25:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:33,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:33,401 INFO 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 15:25:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:33,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053978043] [2024-06-20 15:25:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053978043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:33,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401645852] [2024-06-20 15:25:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:33,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:33,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:33,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 217 transitions, 2391 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:33,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:33,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:33,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:33,798 INFO L124 PetriNetUnfolderBase]: 1780/3107 cut-off events. [2024-06-20 15:25:33,798 INFO L125 PetriNetUnfolderBase]: For 97596/97596 co-relation queries the response was YES. [2024-06-20 15:25:33,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16872 conditions, 3107 events. 1780/3107 cut-off events. For 97596/97596 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19689 event pairs, 483 based on Foata normal form. 1/3105 useless extension candidates. Maximal degree in co-relation 16774. Up to 2569 conditions per place. [2024-06-20 15:25:33,821 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 87 changer transitions 0/238 dead transitions. [2024-06-20 15:25:33,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 238 transitions, 3055 flow [2024-06-20 15:25:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:25:33,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:25:33,823 INFO L175 Difference]: Start difference. First operand has 205 places, 217 transitions, 2391 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:25:33,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 238 transitions, 3055 flow [2024-06-20 15:25:34,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 238 transitions, 2919 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:34,263 INFO L231 Difference]: Finished difference. Result has 207 places, 220 transitions, 2480 flow [2024-06-20 15:25:34,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2480, PETRI_PLACES=207, PETRI_TRANSITIONS=220} [2024-06-20 15:25:34,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-20 15:25:34,264 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 220 transitions, 2480 flow [2024-06-20 15:25:34,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:34,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:34,264 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 15:25:34,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:25:34,264 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 15:25:34,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 35602363, now seen corresponding path program 3 times [2024-06-20 15:25:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:34,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111116360] [2024-06-20 15:25:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:34,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:34,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111116360] [2024-06-20 15:25:34,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111116360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:34,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:34,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791227656] [2024-06-20 15:25:34,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:34,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:34,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:34,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:34,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 220 transitions, 2480 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:34,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:34,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:34,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:34,704 INFO L124 PetriNetUnfolderBase]: 1785/3116 cut-off events. [2024-06-20 15:25:34,704 INFO L125 PetriNetUnfolderBase]: For 98094/98094 co-relation queries the response was YES. [2024-06-20 15:25:34,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16996 conditions, 3116 events. 1785/3116 cut-off events. For 98094/98094 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19724 event pairs, 483 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 16898. Up to 2575 conditions per place. [2024-06-20 15:25:34,731 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 88 changer transitions 0/239 dead transitions. [2024-06-20 15:25:34,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 239 transitions, 3264 flow [2024-06-20 15:25:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:25:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:25:34,733 INFO L175 Difference]: Start difference. First operand has 207 places, 220 transitions, 2480 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:25:34,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 239 transitions, 3264 flow [2024-06-20 15:25:35,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 239 transitions, 3048 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:35,130 INFO L231 Difference]: Finished difference. Result has 209 places, 223 transitions, 2496 flow [2024-06-20 15:25:35,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2496, PETRI_PLACES=209, PETRI_TRANSITIONS=223} [2024-06-20 15:25:35,130 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-20 15:25:35,131 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 223 transitions, 2496 flow [2024-06-20 15:25:35,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:35,131 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 15:25:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:25:35,131 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 15:25:35,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1911905921, now seen corresponding path program 4 times [2024-06-20 15:25:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341080260] [2024-06-20 15:25:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:35,199 INFO 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 15:25:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341080260] [2024-06-20 15:25:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341080260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:35,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:35,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797680057] [2024-06-20 15:25:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:35,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:35,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:35,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:35,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 223 transitions, 2496 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:35,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:35,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:35,556 INFO L124 PetriNetUnfolderBase]: 1782/3112 cut-off events. [2024-06-20 15:25:35,556 INFO L125 PetriNetUnfolderBase]: For 99099/99099 co-relation queries the response was YES. [2024-06-20 15:25:35,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16822 conditions, 3112 events. 1782/3112 cut-off events. For 99099/99099 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19674 event pairs, 483 based on Foata normal form. 1/3110 useless extension candidates. Maximal degree in co-relation 16724. Up to 2572 conditions per place. [2024-06-20 15:25:35,582 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 137 selfloop transitions, 93 changer transitions 0/238 dead transitions. [2024-06-20 15:25:35,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 238 transitions, 3112 flow [2024-06-20 15:25:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:25:35,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:25:35,584 INFO L175 Difference]: Start difference. First operand has 209 places, 223 transitions, 2496 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:25:35,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 238 transitions, 3112 flow [2024-06-20 15:25:35,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 238 transitions, 2923 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:35,919 INFO L231 Difference]: Finished difference. Result has 212 places, 223 transitions, 2499 flow [2024-06-20 15:25:35,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2499, PETRI_PLACES=212, PETRI_TRANSITIONS=223} [2024-06-20 15:25:35,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 15:25:35,920 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 223 transitions, 2499 flow [2024-06-20 15:25:35,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:35,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:35,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:25:35,921 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 15:25:35,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 449925653, now seen corresponding path program 5 times [2024-06-20 15:25:35,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:35,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902905588] [2024-06-20 15:25:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:35,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902905588] [2024-06-20 15:25:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902905588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:35,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911220801] [2024-06-20 15:25:35,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:35,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:35,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:36,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:36,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 223 transitions, 2499 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:36,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:36,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:36,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:36,412 INFO L124 PetriNetUnfolderBase]: 1787/3121 cut-off events. [2024-06-20 15:25:36,412 INFO L125 PetriNetUnfolderBase]: For 101958/101958 co-relation queries the response was YES. [2024-06-20 15:25:36,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16908 conditions, 3121 events. 1787/3121 cut-off events. For 101958/101958 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 19812 event pairs, 481 based on Foata normal form. 1/3119 useless extension candidates. Maximal degree in co-relation 16809. Up to 2642 conditions per place. [2024-06-20 15:25:36,437 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 66 changer transitions 0/242 dead transitions. [2024-06-20 15:25:36,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 242 transitions, 3170 flow [2024-06-20 15:25:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:25:36,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-20 15:25:36,438 INFO L175 Difference]: Start difference. First operand has 212 places, 223 transitions, 2499 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:25:36,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 242 transitions, 3170 flow [2024-06-20 15:25:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 242 transitions, 2806 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:25:36,832 INFO L231 Difference]: Finished difference. Result has 211 places, 226 transitions, 2316 flow [2024-06-20 15:25:36,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2316, PETRI_PLACES=211, PETRI_TRANSITIONS=226} [2024-06-20 15:25:36,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 15:25:36,833 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 226 transitions, 2316 flow [2024-06-20 15:25:36,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:36,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:36,833 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 15:25:36,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:25:36,834 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 15:25:36,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:36,834 INFO L85 PathProgramCache]: Analyzing trace with hash 250623863, now seen corresponding path program 6 times [2024-06-20 15:25:36,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:36,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085657404] [2024-06-20 15:25:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:36,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:36,908 INFO 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 15:25:36,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:36,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085657404] [2024-06-20 15:25:36,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085657404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:36,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:36,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:36,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337351485] [2024-06-20 15:25:36,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:36,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:36,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:36,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:36,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 226 transitions, 2316 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:36,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:36,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:36,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:37,286 INFO L124 PetriNetUnfolderBase]: 1792/3130 cut-off events. [2024-06-20 15:25:37,286 INFO L125 PetriNetUnfolderBase]: For 103514/103514 co-relation queries the response was YES. [2024-06-20 15:25:37,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16836 conditions, 3130 events. 1792/3130 cut-off events. For 103514/103514 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19883 event pairs, 483 based on Foata normal form. 1/3128 useless extension candidates. Maximal degree in co-relation 16737. Up to 2648 conditions per place. [2024-06-20 15:25:37,314 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 171 selfloop transitions, 64 changer transitions 0/243 dead transitions. [2024-06-20 15:25:37,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 243 transitions, 2981 flow [2024-06-20 15:25:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:25:37,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:25:37,315 INFO L175 Difference]: Start difference. First operand has 211 places, 226 transitions, 2316 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:25:37,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 243 transitions, 2981 flow [2024-06-20 15:25:37,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 243 transitions, 2810 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:37,752 INFO L231 Difference]: Finished difference. Result has 211 places, 229 transitions, 2316 flow [2024-06-20 15:25:37,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2316, PETRI_PLACES=211, PETRI_TRANSITIONS=229} [2024-06-20 15:25:37,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 15:25:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 229 transitions, 2316 flow [2024-06-20 15:25:37,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:37,753 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 15:25:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:25:37,753 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 15:25:37,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 250267673, now seen corresponding path program 7 times [2024-06-20 15:25:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:37,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500714241] [2024-06-20 15:25:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:37,828 INFO 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 15:25:37,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:37,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500714241] [2024-06-20 15:25:37,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500714241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:37,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:37,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:37,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939435338] [2024-06-20 15:25:37,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:37,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:37,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:37,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:37,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 229 transitions, 2316 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:37,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:37,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:37,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:38,222 INFO L124 PetriNetUnfolderBase]: 1789/3126 cut-off events. [2024-06-20 15:25:38,222 INFO L125 PetriNetUnfolderBase]: For 104272/104272 co-relation queries the response was YES. [2024-06-20 15:25:38,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16764 conditions, 3126 events. 1789/3126 cut-off events. For 104272/104272 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19877 event pairs, 483 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 16664. Up to 2645 conditions per place. [2024-06-20 15:25:38,249 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 172 selfloop transitions, 65 changer transitions 0/245 dead transitions. [2024-06-20 15:25:38,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 245 transitions, 2830 flow [2024-06-20 15:25:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:25:38,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:38,251 INFO L175 Difference]: Start difference. First operand has 211 places, 229 transitions, 2316 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:25:38,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 245 transitions, 2830 flow [2024-06-20 15:25:38,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 245 transitions, 2680 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:38,682 INFO L231 Difference]: Finished difference. Result has 213 places, 229 transitions, 2304 flow [2024-06-20 15:25:38,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2304, PETRI_PLACES=213, PETRI_TRANSITIONS=229} [2024-06-20 15:25:38,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:25:38,683 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 229 transitions, 2304 flow [2024-06-20 15:25:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:38,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:38,683 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 15:25:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:25:38,683 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 15:25:38,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1724978375, now seen corresponding path program 1 times [2024-06-20 15:25:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604596447] [2024-06-20 15:25:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:38,759 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 15:25:38,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604596447] [2024-06-20 15:25:38,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604596447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830666277] [2024-06-20 15:25:38,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:38,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:38,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:38,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:38,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 229 transitions, 2304 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:38,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:38,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:38,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:39,172 INFO L124 PetriNetUnfolderBase]: 1809/3156 cut-off events. [2024-06-20 15:25:39,172 INFO L125 PetriNetUnfolderBase]: For 117460/117460 co-relation queries the response was YES. [2024-06-20 15:25:39,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 3156 events. 1809/3156 cut-off events. For 117460/117460 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19980 event pairs, 369 based on Foata normal form. 6/3159 useless extension candidates. Maximal degree in co-relation 16844. Up to 2568 conditions per place. [2024-06-20 15:25:39,198 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 222 selfloop transitions, 23 changer transitions 0/253 dead transitions. [2024-06-20 15:25:39,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 253 transitions, 3027 flow [2024-06-20 15:25:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:25:39,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:25:39,200 INFO L175 Difference]: Start difference. First operand has 213 places, 229 transitions, 2304 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:25:39,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 253 transitions, 3027 flow [2024-06-20 15:25:39,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 253 transitions, 2842 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:39,646 INFO L231 Difference]: Finished difference. Result has 213 places, 230 transitions, 2182 flow [2024-06-20 15:25:39,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2182, PETRI_PLACES=213, PETRI_TRANSITIONS=230} [2024-06-20 15:25:39,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:25:39,647 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 230 transitions, 2182 flow [2024-06-20 15:25:39,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:39,647 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 15:25:39,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:25:39,647 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 15:25:39,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash -635242223, now seen corresponding path program 2 times [2024-06-20 15:25:39,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:39,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350214149] [2024-06-20 15:25:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:39,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:39,725 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 15:25:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350214149] [2024-06-20 15:25:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350214149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:39,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:39,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291473661] [2024-06-20 15:25:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:39,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:39,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 230 transitions, 2182 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:39,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:39,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:40,125 INFO L124 PetriNetUnfolderBase]: 1796/3137 cut-off events. [2024-06-20 15:25:40,125 INFO L125 PetriNetUnfolderBase]: For 108125/108125 co-relation queries the response was YES. [2024-06-20 15:25:40,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16449 conditions, 3137 events. 1796/3137 cut-off events. For 108125/108125 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19848 event pairs, 358 based on Foata normal form. 6/3140 useless extension candidates. Maximal degree in co-relation 16347. Up to 2562 conditions per place. [2024-06-20 15:25:40,156 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 218 selfloop transitions, 23 changer transitions 1/250 dead transitions. [2024-06-20 15:25:40,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 250 transitions, 2752 flow [2024-06-20 15:25:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:25:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:25:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:25:40,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-20 15:25:40,157 INFO L175 Difference]: Start difference. First operand has 213 places, 230 transitions, 2182 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:25:40,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 250 transitions, 2752 flow [2024-06-20 15:25:40,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 250 transitions, 2696 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:40,622 INFO L231 Difference]: Finished difference. Result has 215 places, 230 transitions, 2178 flow [2024-06-20 15:25:40,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2178, PETRI_PLACES=215, PETRI_TRANSITIONS=230} [2024-06-20 15:25:40,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-20 15:25:40,622 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 230 transitions, 2178 flow [2024-06-20 15:25:40,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:40,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:40,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:40,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:25:40,624 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 15:25:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1251364619, now seen corresponding path program 1 times [2024-06-20 15:25:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:40,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725250046] [2024-06-20 15:25:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725250046] [2024-06-20 15:25:40,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725250046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:40,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:40,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:40,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838748211] [2024-06-20 15:25:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:40,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:40,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 230 transitions, 2178 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:40,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:40,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:40,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:41,197 INFO L124 PetriNetUnfolderBase]: 1816/3182 cut-off events. [2024-06-20 15:25:41,198 INFO L125 PetriNetUnfolderBase]: For 111876/111876 co-relation queries the response was YES. [2024-06-20 15:25:41,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16608 conditions, 3182 events. 1816/3182 cut-off events. For 111876/111876 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20262 event pairs, 321 based on Foata normal form. 6/3184 useless extension candidates. Maximal degree in co-relation 16506. Up to 2247 conditions per place. [2024-06-20 15:25:41,226 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 70 changer transitions 1/274 dead transitions. [2024-06-20 15:25:41,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 274 transitions, 2910 flow [2024-06-20 15:25:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:25:41,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-20 15:25:41,227 INFO L175 Difference]: Start difference. First operand has 215 places, 230 transitions, 2178 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:25:41,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 274 transitions, 2910 flow [2024-06-20 15:25:41,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 274 transitions, 2837 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:41,704 INFO L231 Difference]: Finished difference. Result has 218 places, 233 transitions, 2329 flow [2024-06-20 15:25:41,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2329, PETRI_PLACES=218, PETRI_TRANSITIONS=233} [2024-06-20 15:25:41,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 15:25:41,704 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 233 transitions, 2329 flow [2024-06-20 15:25:41,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:41,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:41,705 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 15:25:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:25:41,705 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 15:25:41,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash -402144617, now seen corresponding path program 2 times [2024-06-20 15:25:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041265061] [2024-06-20 15:25:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041265061] [2024-06-20 15:25:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041265061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:41,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:41,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044010790] [2024-06-20 15:25:41,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:41,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 233 transitions, 2329 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:41,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:41,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:41,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:42,241 INFO L124 PetriNetUnfolderBase]: 1917/3360 cut-off events. [2024-06-20 15:25:42,242 INFO L125 PetriNetUnfolderBase]: For 146809/146809 co-relation queries the response was YES. [2024-06-20 15:25:42,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18749 conditions, 3360 events. 1917/3360 cut-off events. For 146809/146809 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21535 event pairs, 330 based on Foata normal form. 6/3363 useless extension candidates. Maximal degree in co-relation 18647. Up to 1779 conditions per place. [2024-06-20 15:25:42,273 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 71 changer transitions 0/270 dead transitions. [2024-06-20 15:25:42,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 270 transitions, 3292 flow [2024-06-20 15:25:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:25:42,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-20 15:25:42,274 INFO L175 Difference]: Start difference. First operand has 218 places, 233 transitions, 2329 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:25:42,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 270 transitions, 3292 flow [2024-06-20 15:25:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 270 transitions, 3199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:42,791 INFO L231 Difference]: Finished difference. Result has 221 places, 235 transitions, 2426 flow [2024-06-20 15:25:42,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=221, PETRI_TRANSITIONS=235} [2024-06-20 15:25:42,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 15:25:42,791 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 235 transitions, 2426 flow [2024-06-20 15:25:42,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:42,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:42,792 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 15:25:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:25:42,792 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 15:25:42,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash -401907467, now seen corresponding path program 3 times [2024-06-20 15:25:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853635095] [2024-06-20 15:25:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:42,872 INFO 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 15:25:42,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:42,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853635095] [2024-06-20 15:25:42,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853635095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:42,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:42,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950808523] [2024-06-20 15:25:42,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:42,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:42,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:42,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:42,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 235 transitions, 2426 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:42,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:42,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:42,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:43,328 INFO L124 PetriNetUnfolderBase]: 1904/3346 cut-off events. [2024-06-20 15:25:43,328 INFO L125 PetriNetUnfolderBase]: For 136632/136632 co-relation queries the response was YES. [2024-06-20 15:25:43,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18658 conditions, 3346 events. 1904/3346 cut-off events. For 136632/136632 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21487 event pairs, 287 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 18554. Up to 1773 conditions per place. [2024-06-20 15:25:43,358 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 194 selfloop transitions, 69 changer transitions 0/271 dead transitions. [2024-06-20 15:25:43,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 271 transitions, 3257 flow [2024-06-20 15:25:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:25:43,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-20 15:25:43,359 INFO L175 Difference]: Start difference. First operand has 221 places, 235 transitions, 2426 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:25:43,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 271 transitions, 3257 flow [2024-06-20 15:25:43,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 271 transitions, 3030 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:43,998 INFO L231 Difference]: Finished difference. Result has 222 places, 236 transitions, 2362 flow [2024-06-20 15:25:43,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2362, PETRI_PLACES=222, PETRI_TRANSITIONS=236} [2024-06-20 15:25:43,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 15:25:43,999 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 236 transitions, 2362 flow [2024-06-20 15:25:43,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:43,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:43,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:25:43,999 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 15:25:44,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1934905830, now seen corresponding path program 1 times [2024-06-20 15:25:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:44,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889010766] [2024-06-20 15:25:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:44,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889010766] [2024-06-20 15:25:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889010766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:44,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:44,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531457283] [2024-06-20 15:25:44,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:44,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:44,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 236 transitions, 2362 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:44,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:44,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:44,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:44,631 INFO L124 PetriNetUnfolderBase]: 2003/3502 cut-off events. [2024-06-20 15:25:44,631 INFO L125 PetriNetUnfolderBase]: For 172493/172493 co-relation queries the response was YES. [2024-06-20 15:25:44,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20294 conditions, 3502 events. 2003/3502 cut-off events. For 172493/172493 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22555 event pairs, 418 based on Foata normal form. 6/3503 useless extension candidates. Maximal degree in co-relation 20191. Up to 2613 conditions per place. [2024-06-20 15:25:44,658 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 34 changer transitions 4/289 dead transitions. [2024-06-20 15:25:44,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 289 transitions, 3458 flow [2024-06-20 15:25:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:25:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:25:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-20 15:25:44,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-20 15:25:44,660 INFO L175 Difference]: Start difference. First operand has 222 places, 236 transitions, 2362 flow. Second operand 9 states and 230 transitions. [2024-06-20 15:25:44,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 289 transitions, 3458 flow [2024-06-20 15:25:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 289 transitions, 3362 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:45,094 INFO L231 Difference]: Finished difference. Result has 227 places, 239 transitions, 2418 flow [2024-06-20 15:25:45,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2418, PETRI_PLACES=227, PETRI_TRANSITIONS=239} [2024-06-20 15:25:45,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-20 15:25:45,095 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 239 transitions, 2418 flow [2024-06-20 15:25:45,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:45,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:45,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:25:45,095 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 15:25:45,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash 592846132, now seen corresponding path program 2 times [2024-06-20 15:25:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28061407] [2024-06-20 15:25:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:45,186 INFO 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 15:25:45,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28061407] [2024-06-20 15:25:45,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28061407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:45,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:45,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:45,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527458327] [2024-06-20 15:25:45,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:45,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:45,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:45,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 239 transitions, 2418 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:45,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:45,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:45,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:45,677 INFO L124 PetriNetUnfolderBase]: 1909/3345 cut-off events. [2024-06-20 15:25:45,677 INFO L125 PetriNetUnfolderBase]: For 122491/122491 co-relation queries the response was YES. [2024-06-20 15:25:45,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17994 conditions, 3345 events. 1909/3345 cut-off events. For 122491/122491 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21434 event pairs, 413 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 17890. Up to 2863 conditions per place. [2024-06-20 15:25:45,707 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 237 selfloop transitions, 26 changer transitions 2/273 dead transitions. [2024-06-20 15:25:45,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 273 transitions, 3054 flow [2024-06-20 15:25:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:25:45,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:25:45,709 INFO L175 Difference]: Start difference. First operand has 227 places, 239 transitions, 2418 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:25:45,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 273 transitions, 3054 flow [2024-06-20 15:25:46,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 273 transitions, 2983 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:46,149 INFO L231 Difference]: Finished difference. Result has 231 places, 239 transitions, 2403 flow [2024-06-20 15:25:46,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=231, PETRI_TRANSITIONS=239} [2024-06-20 15:25:46,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-20 15:25:46,150 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 239 transitions, 2403 flow [2024-06-20 15:25:46,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:46,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:46,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:46,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:25:46,150 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 15:25:46,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -829797434, now seen corresponding path program 3 times [2024-06-20 15:25:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:46,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691024987] [2024-06-20 15:25:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:46,237 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 15:25:46,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:46,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691024987] [2024-06-20 15:25:46,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691024987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:46,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:46,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:46,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586770761] [2024-06-20 15:25:46,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:46,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:46,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 239 transitions, 2403 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:46,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:46,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:46,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:46,733 INFO L124 PetriNetUnfolderBase]: 1937/3387 cut-off events. [2024-06-20 15:25:46,734 INFO L125 PetriNetUnfolderBase]: For 131458/131458 co-relation queries the response was YES. [2024-06-20 15:25:46,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18168 conditions, 3387 events. 1937/3387 cut-off events. For 131458/131458 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21796 event pairs, 497 based on Foata normal form. 8/3391 useless extension candidates. Maximal degree in co-relation 18062. Up to 2801 conditions per place. [2024-06-20 15:25:46,764 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 28 changer transitions 0/279 dead transitions. [2024-06-20 15:25:46,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 279 transitions, 3249 flow [2024-06-20 15:25:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:25:46,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-20 15:25:46,765 INFO L175 Difference]: Start difference. First operand has 231 places, 239 transitions, 2403 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:25:46,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 279 transitions, 3249 flow [2024-06-20 15:25:47,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 279 transitions, 3178 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:47,228 INFO L231 Difference]: Finished difference. Result has 231 places, 240 transitions, 2414 flow [2024-06-20 15:25:47,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2414, PETRI_PLACES=231, PETRI_TRANSITIONS=240} [2024-06-20 15:25:47,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-20 15:25:47,228 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 240 transitions, 2414 flow [2024-06-20 15:25:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:47,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:47,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:47,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:25:47,229 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 15:25:47,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash -687485114, now seen corresponding path program 4 times [2024-06-20 15:25:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:47,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292513977] [2024-06-20 15:25:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:47,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:47,329 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 15:25:47,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:47,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292513977] [2024-06-20 15:25:47,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292513977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:47,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:47,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062888686] [2024-06-20 15:25:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:47,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:47,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:47,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 240 transitions, 2414 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:47,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:47,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:47,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:47,892 INFO L124 PetriNetUnfolderBase]: 1919/3363 cut-off events. [2024-06-20 15:25:47,892 INFO L125 PetriNetUnfolderBase]: For 115508/115508 co-relation queries the response was YES. [2024-06-20 15:25:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17459 conditions, 3363 events. 1919/3363 cut-off events. For 115508/115508 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21659 event pairs, 507 based on Foata normal form. 8/3369 useless extension candidates. Maximal degree in co-relation 17352. Up to 2929 conditions per place. [2024-06-20 15:25:47,926 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 236 selfloop transitions, 27 changer transitions 0/271 dead transitions. [2024-06-20 15:25:47,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 271 transitions, 3042 flow [2024-06-20 15:25:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:25:47,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:25:47,927 INFO L175 Difference]: Start difference. First operand has 231 places, 240 transitions, 2414 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:25:47,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 271 transitions, 3042 flow [2024-06-20 15:25:48,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 271 transitions, 2965 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:48,332 INFO L231 Difference]: Finished difference. Result has 233 places, 240 transitions, 2396 flow [2024-06-20 15:25:48,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=233, PETRI_TRANSITIONS=240} [2024-06-20 15:25:48,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:25:48,333 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 240 transitions, 2396 flow [2024-06-20 15:25:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:48,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:48,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:48,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:25:48,334 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 15:25:48,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1248731172, now seen corresponding path program 5 times [2024-06-20 15:25:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29547994] [2024-06-20 15:25:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:48,414 INFO 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 15:25:48,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:48,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29547994] [2024-06-20 15:25:48,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29547994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:48,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:48,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108616200] [2024-06-20 15:25:48,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:48,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:48,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:48,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:48,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 240 transitions, 2396 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:48,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:48,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:48,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:48,936 INFO L124 PetriNetUnfolderBase]: 2120/3673 cut-off events. [2024-06-20 15:25:48,936 INFO L125 PetriNetUnfolderBase]: For 203908/203908 co-relation queries the response was YES. [2024-06-20 15:25:48,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21381 conditions, 3673 events. 2120/3673 cut-off events. For 203908/203908 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23711 event pairs, 615 based on Foata normal form. 8/3672 useless extension candidates. Maximal degree in co-relation 21273. Up to 2701 conditions per place. [2024-06-20 15:25:48,970 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 111 changer transitions 0/280 dead transitions. [2024-06-20 15:25:48,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 280 transitions, 3282 flow [2024-06-20 15:25:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:25:48,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-20 15:25:48,972 INFO L175 Difference]: Start difference. First operand has 233 places, 240 transitions, 2396 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:25:48,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 280 transitions, 3282 flow [2024-06-20 15:25:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 280 transitions, 3206 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:49,674 INFO L231 Difference]: Finished difference. Result has 233 places, 242 transitions, 2600 flow [2024-06-20 15:25:49,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2600, PETRI_PLACES=233, PETRI_TRANSITIONS=242} [2024-06-20 15:25:49,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:25:49,675 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 242 transitions, 2600 flow [2024-06-20 15:25:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:49,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:49,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:25:49,675 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 15:25:49,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:49,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1562643148, now seen corresponding path program 6 times [2024-06-20 15:25:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448688098] [2024-06-20 15:25:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:49,761 INFO 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 15:25:49,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448688098] [2024-06-20 15:25:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448688098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:49,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:49,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50069506] [2024-06-20 15:25:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:49,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 242 transitions, 2600 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:50,277 INFO L124 PetriNetUnfolderBase]: 2148/3717 cut-off events. [2024-06-20 15:25:50,278 INFO L125 PetriNetUnfolderBase]: For 211402/211402 co-relation queries the response was YES. [2024-06-20 15:25:50,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21965 conditions, 3717 events. 2148/3717 cut-off events. For 211402/211402 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24004 event pairs, 635 based on Foata normal form. 8/3716 useless extension candidates. Maximal degree in co-relation 21857. Up to 3122 conditions per place. [2024-06-20 15:25:50,314 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 153 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-20 15:25:50,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 271 transitions, 3248 flow [2024-06-20 15:25:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:25:50,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:50,315 INFO L175 Difference]: Start difference. First operand has 233 places, 242 transitions, 2600 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:25:50,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 271 transitions, 3248 flow [2024-06-20 15:25:51,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 271 transitions, 3070 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:51,123 INFO L231 Difference]: Finished difference. Result has 237 places, 243 transitions, 2677 flow [2024-06-20 15:25:51,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2677, PETRI_PLACES=237, PETRI_TRANSITIONS=243} [2024-06-20 15:25:51,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-20 15:25:51,123 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 243 transitions, 2677 flow [2024-06-20 15:25:51,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:51,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:51,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:51,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:25:51,124 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 15:25:51,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1000782540, now seen corresponding path program 7 times [2024-06-20 15:25:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:51,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247382708] [2024-06-20 15:25:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:51,208 INFO 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 15:25:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247382708] [2024-06-20 15:25:51,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247382708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:51,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:51,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:51,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695318886] [2024-06-20 15:25:51,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:51,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:51,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:51,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:51,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:51,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 243 transitions, 2677 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:51,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:51,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:51,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:51,715 INFO L124 PetriNetUnfolderBase]: 2176/3761 cut-off events. [2024-06-20 15:25:51,715 INFO L125 PetriNetUnfolderBase]: For 215105/215105 co-relation queries the response was YES. [2024-06-20 15:25:51,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22262 conditions, 3761 events. 2176/3761 cut-off events. For 215105/215105 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24296 event pairs, 639 based on Foata normal form. 8/3760 useless extension candidates. Maximal degree in co-relation 22152. Up to 3166 conditions per place. [2024-06-20 15:25:51,753 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 152 selfloop transitions, 109 changer transitions 0/269 dead transitions. [2024-06-20 15:25:51,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 269 transitions, 3305 flow [2024-06-20 15:25:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:25:51,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:25:51,754 INFO L175 Difference]: Start difference. First operand has 237 places, 243 transitions, 2677 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:25:51,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 269 transitions, 3305 flow [2024-06-20 15:25:52,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 269 transitions, 3082 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:52,451 INFO L231 Difference]: Finished difference. Result has 239 places, 244 transitions, 2699 flow [2024-06-20 15:25:52,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2699, PETRI_PLACES=239, PETRI_TRANSITIONS=244} [2024-06-20 15:25:52,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-20 15:25:52,452 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 244 transitions, 2699 flow [2024-06-20 15:25:52,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:52,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:52,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:25:52,453 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 15:25:52,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1609700044, now seen corresponding path program 8 times [2024-06-20 15:25:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:52,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88426407] [2024-06-20 15:25:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:52,544 INFO 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 15:25:52,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88426407] [2024-06-20 15:25:52,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88426407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:52,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:52,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136424841] [2024-06-20 15:25:52,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:52,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:52,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:52,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 244 transitions, 2699 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:52,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:52,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:53,108 INFO L124 PetriNetUnfolderBase]: 2204/3814 cut-off events. [2024-06-20 15:25:53,109 INFO L125 PetriNetUnfolderBase]: For 221248/221248 co-relation queries the response was YES. [2024-06-20 15:25:53,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22629 conditions, 3814 events. 2204/3814 cut-off events. For 221248/221248 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24774 event pairs, 624 based on Foata normal form. 8/3820 useless extension candidates. Maximal degree in co-relation 22518. Up to 3386 conditions per place. [2024-06-20 15:25:53,148 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 27 changer transitions 0/268 dead transitions. [2024-06-20 15:25:53,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 268 transitions, 3327 flow [2024-06-20 15:25:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:25:53,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:25:53,149 INFO L175 Difference]: Start difference. First operand has 239 places, 244 transitions, 2699 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:25:53,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 268 transitions, 3327 flow [2024-06-20 15:25:53,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 268 transitions, 3104 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:53,732 INFO L231 Difference]: Finished difference. Result has 241 places, 245 transitions, 2559 flow [2024-06-20 15:25:53,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2559, PETRI_PLACES=241, PETRI_TRANSITIONS=245} [2024-06-20 15:25:53,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 15:25:53,733 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 245 transitions, 2559 flow [2024-06-20 15:25:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:53,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:53,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:53,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:25:53,733 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 15:25:53,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash 545794196, now seen corresponding path program 1 times [2024-06-20 15:25:53,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:53,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661243885] [2024-06-20 15:25:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:53,813 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 15:25:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661243885] [2024-06-20 15:25:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661243885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935805788] [2024-06-20 15:25:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:53,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:53,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 245 transitions, 2559 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:53,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:53,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:54,456 INFO L124 PetriNetUnfolderBase]: 2371/4086 cut-off events. [2024-06-20 15:25:54,456 INFO L125 PetriNetUnfolderBase]: For 304554/304554 co-relation queries the response was YES. [2024-06-20 15:25:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25996 conditions, 4086 events. 2371/4086 cut-off events. For 304554/304554 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26743 event pairs, 640 based on Foata normal form. 6/4075 useless extension candidates. Maximal degree in co-relation 25884. Up to 2422 conditions per place. [2024-06-20 15:25:54,500 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 160 selfloop transitions, 123 changer transitions 0/291 dead transitions. [2024-06-20 15:25:54,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 291 transitions, 3657 flow [2024-06-20 15:25:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:25:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-20 15:25:54,501 INFO L175 Difference]: Start difference. First operand has 241 places, 245 transitions, 2559 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:25:54,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 291 transitions, 3657 flow [2024-06-20 15:25:55,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 291 transitions, 3596 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:55,377 INFO L231 Difference]: Finished difference. Result has 243 places, 247 transitions, 2806 flow [2024-06-20 15:25:55,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2806, PETRI_PLACES=243, PETRI_TRANSITIONS=247} [2024-06-20 15:25:55,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-20 15:25:55,378 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 247 transitions, 2806 flow [2024-06-20 15:25:55,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:55,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:55,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:55,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:25:55,378 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 15:25:55,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:55,379 INFO L85 PathProgramCache]: Analyzing trace with hash 555317396, now seen corresponding path program 2 times [2024-06-20 15:25:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:55,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657878687] [2024-06-20 15:25:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:55,484 INFO 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 15:25:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657878687] [2024-06-20 15:25:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657878687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:55,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:55,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284501891] [2024-06-20 15:25:55,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:55,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:55,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 247 transitions, 2806 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:55,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:55,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:55,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:56,101 INFO L124 PetriNetUnfolderBase]: 2391/4116 cut-off events. [2024-06-20 15:25:56,101 INFO L125 PetriNetUnfolderBase]: For 315900/315900 co-relation queries the response was YES. [2024-06-20 15:25:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26720 conditions, 4116 events. 2391/4116 cut-off events. For 315900/315900 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26949 event pairs, 702 based on Foata normal form. 6/4105 useless extension candidates. Maximal degree in co-relation 26607. Up to 2434 conditions per place. [2024-06-20 15:25:56,146 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 123 changer transitions 0/286 dead transitions. [2024-06-20 15:25:56,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 286 transitions, 3700 flow [2024-06-20 15:25:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:25:56,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-20 15:25:56,156 INFO L175 Difference]: Start difference. First operand has 243 places, 247 transitions, 2806 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:25:56,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 286 transitions, 3700 flow [2024-06-20 15:25:57,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 286 transitions, 3416 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:57,211 INFO L231 Difference]: Finished difference. Result has 246 places, 248 transitions, 2802 flow [2024-06-20 15:25:57,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2802, PETRI_PLACES=246, PETRI_TRANSITIONS=248} [2024-06-20 15:25:57,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-20 15:25:57,212 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 248 transitions, 2802 flow [2024-06-20 15:25:57,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:57,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:57,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:57,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:25:57,212 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 15:25:57,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash -994111340, now seen corresponding path program 3 times [2024-06-20 15:25:57,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:57,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425042216] [2024-06-20 15:25:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:57,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:57,301 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 15:25:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:57,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425042216] [2024-06-20 15:25:57,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425042216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:57,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:57,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:57,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99794354] [2024-06-20 15:25:57,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:57,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:57,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:57,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:57,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 248 transitions, 2802 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:57,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:57,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:57,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:57,956 INFO L124 PetriNetUnfolderBase]: 2411/4164 cut-off events. [2024-06-20 15:25:57,956 INFO L125 PetriNetUnfolderBase]: For 319635/319635 co-relation queries the response was YES. [2024-06-20 15:25:57,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26828 conditions, 4164 events. 2411/4164 cut-off events. For 319635/319635 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27415 event pairs, 762 based on Foata normal form. 6/4159 useless extension candidates. Maximal degree in co-relation 26714. Up to 3449 conditions per place. [2024-06-20 15:25:57,998 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 156 selfloop transitions, 113 changer transitions 0/277 dead transitions. [2024-06-20 15:25:57,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 277 transitions, 3462 flow [2024-06-20 15:25:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:25:57,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:25:57,999 INFO L175 Difference]: Start difference. First operand has 246 places, 248 transitions, 2802 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:25:57,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 277 transitions, 3462 flow [2024-06-20 15:25:58,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 277 transitions, 3242 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:58,954 INFO L231 Difference]: Finished difference. Result has 249 places, 249 transitions, 2834 flow [2024-06-20 15:25:58,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2834, PETRI_PLACES=249, PETRI_TRANSITIONS=249} [2024-06-20 15:25:58,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-20 15:25:58,955 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 249 transitions, 2834 flow [2024-06-20 15:25:58,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:58,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:58,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:58,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:25:58,956 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 15:25:58,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1868446666, now seen corresponding path program 4 times [2024-06-20 15:25:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:58,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225314549] [2024-06-20 15:25:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:59,052 INFO 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 15:25:59,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:59,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225314549] [2024-06-20 15:25:59,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225314549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:59,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:59,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661267258] [2024-06-20 15:25:59,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:59,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:59,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:25:59,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 249 transitions, 2834 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:59,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:59,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:25:59,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:59,667 INFO L124 PetriNetUnfolderBase]: 2431/4209 cut-off events. [2024-06-20 15:25:59,667 INFO L125 PetriNetUnfolderBase]: For 327896/327896 co-relation queries the response was YES. [2024-06-20 15:25:59,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 4209 events. 2431/4209 cut-off events. For 327896/327896 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27805 event pairs, 749 based on Foata normal form. 6/4211 useless extension candidates. Maximal degree in co-relation 26896. Up to 3721 conditions per place. [2024-06-20 15:25:59,712 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 239 selfloop transitions, 29 changer transitions 0/276 dead transitions. [2024-06-20 15:25:59,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 276 transitions, 3493 flow [2024-06-20 15:25:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:25:59,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:25:59,713 INFO L175 Difference]: Start difference. First operand has 249 places, 249 transitions, 2834 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:25:59,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 276 transitions, 3493 flow [2024-06-20 15:26:00,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 276 transitions, 3261 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:00,427 INFO L231 Difference]: Finished difference. Result has 251 places, 250 transitions, 2687 flow [2024-06-20 15:26:00,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2687, PETRI_PLACES=251, PETRI_TRANSITIONS=250} [2024-06-20 15:26:00,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-20 15:26:00,427 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 250 transitions, 2687 flow [2024-06-20 15:26:00,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:00,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:00,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:00,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:26:00,428 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 15:26:00,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2107862324, now seen corresponding path program 9 times [2024-06-20 15:26:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:00,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212737013] [2024-06-20 15:26:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:00,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:00,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212737013] [2024-06-20 15:26:00,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212737013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:00,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:00,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:00,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640717749] [2024-06-20 15:26:00,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:00,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:00,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:00,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:00,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:00,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 250 transitions, 2687 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:00,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:00,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:00,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:01,228 INFO L124 PetriNetUnfolderBase]: 2619/4502 cut-off events. [2024-06-20 15:26:01,228 INFO L125 PetriNetUnfolderBase]: For 441733/441733 co-relation queries the response was YES. [2024-06-20 15:26:01,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30866 conditions, 4502 events. 2619/4502 cut-off events. For 441733/441733 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30036 event pairs, 863 based on Foata normal form. 8/4507 useless extension candidates. Maximal degree in co-relation 30750. Up to 3492 conditions per place. [2024-06-20 15:26:01,271 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 178 selfloop transitions, 101 changer transitions 0/287 dead transitions. [2024-06-20 15:26:01,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 287 transitions, 3599 flow [2024-06-20 15:26:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:26:01,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:26:01,272 INFO L175 Difference]: Start difference. First operand has 251 places, 250 transitions, 2687 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:26:01,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 287 transitions, 3599 flow [2024-06-20 15:26:02,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 287 transitions, 3533 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:02,501 INFO L231 Difference]: Finished difference. Result has 253 places, 252 transitions, 2885 flow [2024-06-20 15:26:02,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2885, PETRI_PLACES=253, PETRI_TRANSITIONS=252} [2024-06-20 15:26:02,502 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-20 15:26:02,502 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 252 transitions, 2885 flow [2024-06-20 15:26:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:02,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:02,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:02,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:26:02,502 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 15:26:02,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:02,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1683523314, now seen corresponding path program 10 times [2024-06-20 15:26:02,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:02,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775648793] [2024-06-20 15:26:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:02,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775648793] [2024-06-20 15:26:02,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775648793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:02,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:02,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493029258] [2024-06-20 15:26:02,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:02,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:02,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:02,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 252 transitions, 2885 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:02,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:02,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:02,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:03,276 INFO L124 PetriNetUnfolderBase]: 2647/4546 cut-off events. [2024-06-20 15:26:03,276 INFO L125 PetriNetUnfolderBase]: For 454608/454608 co-relation queries the response was YES. [2024-06-20 15:26:03,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31566 conditions, 4546 events. 2647/4546 cut-off events. For 454608/454608 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30325 event pairs, 883 based on Foata normal form. 8/4551 useless extension candidates. Maximal degree in co-relation 31449. Up to 3919 conditions per place. [2024-06-20 15:26:03,328 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 100 changer transitions 0/278 dead transitions. [2024-06-20 15:26:03,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 278 transitions, 3541 flow [2024-06-20 15:26:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:26:03,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:26:03,329 INFO L175 Difference]: Start difference. First operand has 253 places, 252 transitions, 2885 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:26:03,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 278 transitions, 3541 flow [2024-06-20 15:26:04,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 278 transitions, 3377 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:26:04,442 INFO L231 Difference]: Finished difference. Result has 257 places, 253 transitions, 2958 flow [2024-06-20 15:26:04,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2958, PETRI_PLACES=257, PETRI_TRANSITIONS=253} [2024-06-20 15:26:04,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-20 15:26:04,443 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 253 transitions, 2958 flow [2024-06-20 15:26:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:04,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:04,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:04,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:26:04,444 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 15:26:04,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1617625804, now seen corresponding path program 11 times [2024-06-20 15:26:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:04,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688311057] [2024-06-20 15:26:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:04,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:04,548 INFO 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 15:26:04,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:04,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688311057] [2024-06-20 15:26:04,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688311057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:04,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:04,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113074568] [2024-06-20 15:26:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:04,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:04,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 253 transitions, 2958 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:04,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:04,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:04,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:05,274 INFO L124 PetriNetUnfolderBase]: 2675/4590 cut-off events. [2024-06-20 15:26:05,275 INFO L125 PetriNetUnfolderBase]: For 463261/463261 co-relation queries the response was YES. [2024-06-20 15:26:05,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31869 conditions, 4590 events. 2675/4590 cut-off events. For 463261/463261 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30698 event pairs, 887 based on Foata normal form. 8/4595 useless extension candidates. Maximal degree in co-relation 31750. Up to 3963 conditions per place. [2024-06-20 15:26:05,321 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 98 changer transitions 0/276 dead transitions. [2024-06-20 15:26:05,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 276 transitions, 3592 flow [2024-06-20 15:26:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:26:05,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:26:05,323 INFO L175 Difference]: Start difference. First operand has 257 places, 253 transitions, 2958 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:26:05,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 276 transitions, 3592 flow [2024-06-20 15:26:06,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 276 transitions, 3389 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:06,486 INFO L231 Difference]: Finished difference. Result has 259 places, 254 transitions, 2978 flow [2024-06-20 15:26:06,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=259, PETRI_TRANSITIONS=254} [2024-06-20 15:26:06,487 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-20 15:26:06,487 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 254 transitions, 2978 flow [2024-06-20 15:26:06,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:06,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:06,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:06,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:26:06,487 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 15:26:06,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash -502047436, now seen corresponding path program 12 times [2024-06-20 15:26:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:06,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242926517] [2024-06-20 15:26:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:06,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:06,572 INFO 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 15:26:06,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:06,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242926517] [2024-06-20 15:26:06,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242926517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:06,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:06,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:06,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812001156] [2024-06-20 15:26:06,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:06,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:06,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:06,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 254 transitions, 2978 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:06,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:06,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:06,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:07,273 INFO L124 PetriNetUnfolderBase]: 2779/4762 cut-off events. [2024-06-20 15:26:07,273 INFO L125 PetriNetUnfolderBase]: For 560903/560903 co-relation queries the response was YES. [2024-06-20 15:26:07,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32813 conditions, 4762 events. 2779/4762 cut-off events. For 560903/560903 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32055 event pairs, 927 based on Foata normal form. 34/4793 useless extension candidates. Maximal degree in co-relation 32693. Up to 4001 conditions per place. [2024-06-20 15:26:07,324 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 173 selfloop transitions, 92 changer transitions 3/276 dead transitions. [2024-06-20 15:26:07,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 276 transitions, 3618 flow [2024-06-20 15:26:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:26:07,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:26:07,325 INFO L175 Difference]: Start difference. First operand has 259 places, 254 transitions, 2978 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:26:07,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 276 transitions, 3618 flow [2024-06-20 15:26:08,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 276 transitions, 3417 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:08,557 INFO L231 Difference]: Finished difference. Result has 261 places, 254 transitions, 2983 flow [2024-06-20 15:26:08,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2983, PETRI_PLACES=261, PETRI_TRANSITIONS=254} [2024-06-20 15:26:08,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-20 15:26:08,558 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 254 transitions, 2983 flow [2024-06-20 15:26:08,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:08,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:08,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:08,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:26:08,559 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 15:26:08,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash -71049068, now seen corresponding path program 5 times [2024-06-20 15:26:08,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:08,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614784293] [2024-06-20 15:26:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:08,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:08,637 INFO 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 15:26:08,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:08,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614784293] [2024-06-20 15:26:08,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614784293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:08,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:08,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:08,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129477055] [2024-06-20 15:26:08,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:08,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:08,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:08,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:08,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 254 transitions, 2983 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:08,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:08,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:09,407 INFO L124 PetriNetUnfolderBase]: 2936/5037 cut-off events. [2024-06-20 15:26:09,408 INFO L125 PetriNetUnfolderBase]: For 582812/582812 co-relation queries the response was YES. [2024-06-20 15:26:09,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36647 conditions, 5037 events. 2936/5037 cut-off events. For 582812/582812 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34242 event pairs, 932 based on Foata normal form. 6/5040 useless extension candidates. Maximal degree in co-relation 36526. Up to 3333 conditions per place. [2024-06-20 15:26:09,463 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 179 selfloop transitions, 110 changer transitions 0/297 dead transitions. [2024-06-20 15:26:09,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 297 transitions, 4121 flow [2024-06-20 15:26:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:26:09,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-20 15:26:09,464 INFO L175 Difference]: Start difference. First operand has 261 places, 254 transitions, 2983 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:26:09,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 297 transitions, 4121 flow [2024-06-20 15:26:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 297 transitions, 3930 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:10,788 INFO L231 Difference]: Finished difference. Result has 263 places, 256 transitions, 3078 flow [2024-06-20 15:26:10,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3078, PETRI_PLACES=263, PETRI_TRANSITIONS=256} [2024-06-20 15:26:10,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-20 15:26:10,789 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 256 transitions, 3078 flow [2024-06-20 15:26:10,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:10,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:10,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:10,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:26:10,790 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 15:26:10,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:10,790 INFO L85 PathProgramCache]: Analyzing trace with hash -61525868, now seen corresponding path program 6 times [2024-06-20 15:26:10,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:10,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917745449] [2024-06-20 15:26:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:10,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:10,869 INFO 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 15:26:10,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917745449] [2024-06-20 15:26:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917745449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:10,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:10,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129984232] [2024-06-20 15:26:10,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:10,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:10,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 256 transitions, 3078 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:10,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:10,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:10,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:11,613 INFO L124 PetriNetUnfolderBase]: 2956/5067 cut-off events. [2024-06-20 15:26:11,613 INFO L125 PetriNetUnfolderBase]: For 599436/599436 co-relation queries the response was YES. [2024-06-20 15:26:11,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37221 conditions, 5067 events. 2956/5067 cut-off events. For 599436/599436 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34465 event pairs, 1010 based on Foata normal form. 6/5070 useless extension candidates. Maximal degree in co-relation 37099. Up to 3345 conditions per place. [2024-06-20 15:26:11,670 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 109 changer transitions 0/292 dead transitions. [2024-06-20 15:26:11,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 292 transitions, 3994 flow [2024-06-20 15:26:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:26:11,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-20 15:26:11,671 INFO L175 Difference]: Start difference. First operand has 263 places, 256 transitions, 3078 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:26:11,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 292 transitions, 3994 flow [2024-06-20 15:26:12,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 292 transitions, 3731 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:12,873 INFO L231 Difference]: Finished difference. Result has 266 places, 257 transitions, 3069 flow [2024-06-20 15:26:12,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3069, PETRI_PLACES=266, PETRI_TRANSITIONS=257} [2024-06-20 15:26:12,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 15:26:12,874 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 257 transitions, 3069 flow [2024-06-20 15:26:12,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:12,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:12,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:12,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:26:12,874 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 15:26:12,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 656440408, now seen corresponding path program 7 times [2024-06-20 15:26:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:12,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814491733] [2024-06-20 15:26:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:12,957 INFO 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 15:26:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:12,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814491733] [2024-06-20 15:26:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814491733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:12,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047387077] [2024-06-20 15:26:12,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:13,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 257 transitions, 3069 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,695 INFO L124 PetriNetUnfolderBase]: 2976/5109 cut-off events. [2024-06-20 15:26:13,695 INFO L125 PetriNetUnfolderBase]: For 609141/609141 co-relation queries the response was YES. [2024-06-20 15:26:13,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37311 conditions, 5109 events. 2976/5109 cut-off events. For 609141/609141 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34868 event pairs, 1048 based on Foata normal form. 6/5112 useless extension candidates. Maximal degree in co-relation 37188. Up to 4392 conditions per place. [2024-06-20 15:26:13,753 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 100 changer transitions 0/283 dead transitions. [2024-06-20 15:26:13,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 283 transitions, 3733 flow [2024-06-20 15:26:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:26:13,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:26:13,755 INFO L175 Difference]: Start difference. First operand has 266 places, 257 transitions, 3069 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:26:13,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 283 transitions, 3733 flow [2024-06-20 15:26:15,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 283 transitions, 3536 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:15,233 INFO L231 Difference]: Finished difference. Result has 269 places, 258 transitions, 3098 flow [2024-06-20 15:26:15,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3098, PETRI_PLACES=269, PETRI_TRANSITIONS=258} [2024-06-20 15:26:15,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-20 15:26:15,234 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 258 transitions, 3098 flow [2024-06-20 15:26:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:15,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:15,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:26:15,235 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 15:26:15,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash -308107116, now seen corresponding path program 8 times [2024-06-20 15:26:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:15,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360176374] [2024-06-20 15:26:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:15,313 INFO 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 15:26:15,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360176374] [2024-06-20 15:26:15,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360176374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:15,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:15,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018605338] [2024-06-20 15:26:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:15,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:15,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:15,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 258 transitions, 3098 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:15,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:15,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:15,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:16,210 INFO L124 PetriNetUnfolderBase]: 3224/5567 cut-off events. [2024-06-20 15:26:16,211 INFO L125 PetriNetUnfolderBase]: For 798180/798180 co-relation queries the response was YES. [2024-06-20 15:26:16,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43195 conditions, 5567 events. 3224/5567 cut-off events. For 798180/798180 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38828 event pairs, 1075 based on Foata normal form. 6/5570 useless extension candidates. Maximal degree in co-relation 43071. Up to 3377 conditions per place. [2024-06-20 15:26:16,269 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 194 selfloop transitions, 102 changer transitions 0/304 dead transitions. [2024-06-20 15:26:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 304 transitions, 4264 flow [2024-06-20 15:26:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:26:16,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.659375 [2024-06-20 15:26:16,271 INFO L175 Difference]: Start difference. First operand has 269 places, 258 transitions, 3098 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:26:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 304 transitions, 4264 flow [2024-06-20 15:26:17,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 304 transitions, 4058 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:17,588 INFO L231 Difference]: Finished difference. Result has 271 places, 259 transitions, 3130 flow [2024-06-20 15:26:17,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3130, PETRI_PLACES=271, PETRI_TRANSITIONS=259} [2024-06-20 15:26:17,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 15:26:17,589 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 259 transitions, 3130 flow [2024-06-20 15:26:17,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:17,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:17,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:17,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:26:17,590 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 15:26:17,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 197379182, now seen corresponding path program 9 times [2024-06-20 15:26:17,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:17,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154849390] [2024-06-20 15:26:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:17,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:17,668 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 15:26:17,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154849390] [2024-06-20 15:26:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154849390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:17,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:17,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:17,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139672981] [2024-06-20 15:26:17,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:17,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:17,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:17,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:17,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 259 transitions, 3130 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:17,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:17,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:17,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:18,516 INFO L124 PetriNetUnfolderBase]: 3244/5603 cut-off events. [2024-06-20 15:26:18,516 INFO L125 PetriNetUnfolderBase]: For 818612/818612 co-relation queries the response was YES. [2024-06-20 15:26:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43789 conditions, 5603 events. 3244/5603 cut-off events. For 818612/818612 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39082 event pairs, 1075 based on Foata normal form. 6/5606 useless extension candidates. Maximal degree in co-relation 43664. Up to 3389 conditions per place. [2024-06-20 15:26:18,580 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 193 selfloop transitions, 100 changer transitions 0/301 dead transitions. [2024-06-20 15:26:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 301 transitions, 4272 flow [2024-06-20 15:26:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:26:18,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-20 15:26:18,581 INFO L175 Difference]: Start difference. First operand has 271 places, 259 transitions, 3130 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:26:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 301 transitions, 4272 flow [2024-06-20 15:26:20,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 301 transitions, 3788 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-06-20 15:26:20,453 INFO L231 Difference]: Finished difference. Result has 267 places, 260 transitions, 2882 flow [2024-06-20 15:26:20,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=267, PETRI_TRANSITIONS=260} [2024-06-20 15:26:20,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 15:26:20,454 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 260 transitions, 2882 flow [2024-06-20 15:26:20,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:20,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:20,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:20,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:26:20,455 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 15:26:20,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2093635732, now seen corresponding path program 10 times [2024-06-20 15:26:20,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:20,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027309542] [2024-06-20 15:26:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:20,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:20,542 INFO 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 15:26:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:20,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027309542] [2024-06-20 15:26:20,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027309542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:20,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:20,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312328942] [2024-06-20 15:26:20,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:20,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:20,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 260 transitions, 2882 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:20,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:21,490 INFO L124 PetriNetUnfolderBase]: 3426/5899 cut-off events. [2024-06-20 15:26:21,491 INFO L125 PetriNetUnfolderBase]: For 993986/993986 co-relation queries the response was YES. [2024-06-20 15:26:21,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45780 conditions, 5899 events. 3426/5899 cut-off events. For 993986/993986 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41542 event pairs, 1110 based on Foata normal form. 24/5920 useless extension candidates. Maximal degree in co-relation 45661. Up to 3424 conditions per place. [2024-06-20 15:26:21,555 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 193 selfloop transitions, 94 changer transitions 6/301 dead transitions. [2024-06-20 15:26:21,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 301 transitions, 4017 flow [2024-06-20 15:26:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:26:21,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-20 15:26:21,557 INFO L175 Difference]: Start difference. First operand has 267 places, 260 transitions, 2882 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:26:21,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 301 transitions, 4017 flow [2024-06-20 15:26:23,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 301 transitions, 3826 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:23,685 INFO L231 Difference]: Finished difference. Result has 270 places, 259 transitions, 2891 flow [2024-06-20 15:26:23,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2891, PETRI_PLACES=270, PETRI_TRANSITIONS=259} [2024-06-20 15:26:23,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-20 15:26:23,685 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 259 transitions, 2891 flow [2024-06-20 15:26:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:23,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:23,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:26:23,686 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 15:26:23,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash -352732050, now seen corresponding path program 11 times [2024-06-20 15:26:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:23,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021416672] [2024-06-20 15:26:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:23,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:23,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021416672] [2024-06-20 15:26:23,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021416672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:23,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:23,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:23,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295079470] [2024-06-20 15:26:23,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:23,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:23,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:23,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:23,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 259 transitions, 2891 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:23,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:23,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:23,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:24,827 INFO L124 PetriNetUnfolderBase]: 3696/6381 cut-off events. [2024-06-20 15:26:24,827 INFO L125 PetriNetUnfolderBase]: For 1252721/1252721 co-relation queries the response was YES. [2024-06-20 15:26:24,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52907 conditions, 6381 events. 3696/6381 cut-off events. For 1252721/1252721 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46051 event pairs, 1494 based on Foata normal form. 30/6408 useless extension candidates. Maximal degree in co-relation 52787. Up to 4256 conditions per place. [2024-06-20 15:26:24,899 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 90 changer transitions 9/293 dead transitions. [2024-06-20 15:26:24,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 293 transitions, 3839 flow [2024-06-20 15:26:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:26:24,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:26:24,901 INFO L175 Difference]: Start difference. First operand has 270 places, 259 transitions, 2891 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:26:24,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 293 transitions, 3839 flow [2024-06-20 15:26:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 293 transitions, 3641 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:27,495 INFO L231 Difference]: Finished difference. Result has 272 places, 257 transitions, 2875 flow [2024-06-20 15:26:27,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2875, PETRI_PLACES=272, PETRI_TRANSITIONS=257} [2024-06-20 15:26:27,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-20 15:26:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 257 transitions, 2875 flow [2024-06-20 15:26:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:27,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:26:27,498 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 15:26:27,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash 586862, now seen corresponding path program 12 times [2024-06-20 15:26:27,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:27,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844659707] [2024-06-20 15:26:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:27,583 INFO 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 15:26:27,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:27,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844659707] [2024-06-20 15:26:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844659707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:27,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313351798] [2024-06-20 15:26:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:27,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:27,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 257 transitions, 2875 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:27,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:27,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:27,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:28,409 INFO L124 PetriNetUnfolderBase]: 3273/5632 cut-off events. [2024-06-20 15:26:28,409 INFO L125 PetriNetUnfolderBase]: For 971832/971832 co-relation queries the response was YES. [2024-06-20 15:26:28,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43376 conditions, 5632 events. 3273/5632 cut-off events. For 971832/971832 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39358 event pairs, 1203 based on Foata normal form. 30/5659 useless extension candidates. Maximal degree in co-relation 43255. Up to 4643 conditions per place. [2024-06-20 15:26:28,472 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 177 selfloop transitions, 92 changer transitions 8/285 dead transitions. [2024-06-20 15:26:28,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 285 transitions, 3577 flow [2024-06-20 15:26:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:26:28,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:26:28,473 INFO L175 Difference]: Start difference. First operand has 272 places, 257 transitions, 2875 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:26:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 285 transitions, 3577 flow [2024-06-20 15:26:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 285 transitions, 3381 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:30,306 INFO L231 Difference]: Finished difference. Result has 274 places, 255 transitions, 2865 flow [2024-06-20 15:26:30,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=274, PETRI_TRANSITIONS=255} [2024-06-20 15:26:30,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 15:26:30,307 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 255 transitions, 2865 flow [2024-06-20 15:26:30,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:30,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:30,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:30,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:26:30,307 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 15:26:30,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 859335014, now seen corresponding path program 13 times [2024-06-20 15:26:30,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:30,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898391180] [2024-06-20 15:26:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:30,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:30,396 INFO 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 15:26:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898391180] [2024-06-20 15:26:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898391180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:30,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978726257] [2024-06-20 15:26:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:30,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:30,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 255 transitions, 2865 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:30,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:30,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:31,146 INFO L124 PetriNetUnfolderBase]: 2886/4973 cut-off events. [2024-06-20 15:26:31,146 INFO L125 PetriNetUnfolderBase]: For 765920/765920 co-relation queries the response was YES. [2024-06-20 15:26:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35513 conditions, 4973 events. 2886/4973 cut-off events. For 765920/765920 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33948 event pairs, 1025 based on Foata normal form. 34/5004 useless extension candidates. Maximal degree in co-relation 35391. Up to 4162 conditions per place. [2024-06-20 15:26:31,201 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 64 changer transitions 3/284 dead transitions. [2024-06-20 15:26:31,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 284 transitions, 3521 flow [2024-06-20 15:26:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:26:31,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:26:31,202 INFO L175 Difference]: Start difference. First operand has 274 places, 255 transitions, 2865 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:26:31,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 284 transitions, 3521 flow [2024-06-20 15:26:33,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 284 transitions, 3315 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:33,456 INFO L231 Difference]: Finished difference. Result has 275 places, 254 transitions, 2788 flow [2024-06-20 15:26:33,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=275, PETRI_TRANSITIONS=254} [2024-06-20 15:26:33,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-20 15:26:33,456 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 254 transitions, 2788 flow [2024-06-20 15:26:33,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:33,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:33,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:33,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:26:33,457 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 15:26:33,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1790731320, now seen corresponding path program 14 times [2024-06-20 15:26:33,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:33,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251266322] [2024-06-20 15:26:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:33,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:33,545 INFO 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 15:26:33,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251266322] [2024-06-20 15:26:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251266322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:33,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177859412] [2024-06-20 15:26:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:33,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:33,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:33,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 254 transitions, 2788 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:33,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:33,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:33,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:34,304 INFO L124 PetriNetUnfolderBase]: 2807/4865 cut-off events. [2024-06-20 15:26:34,304 INFO L125 PetriNetUnfolderBase]: For 640858/640858 co-relation queries the response was YES. [2024-06-20 15:26:34,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31907 conditions, 4865 events. 2807/4865 cut-off events. For 640858/640858 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33135 event pairs, 956 based on Foata normal form. 34/4897 useless extension candidates. Maximal degree in co-relation 31784. Up to 4013 conditions per place. [2024-06-20 15:26:34,357 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 74 changer transitions 3/294 dead transitions. [2024-06-20 15:26:34,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 294 transitions, 3492 flow [2024-06-20 15:26:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:26:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:26:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-20 15:26:34,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:26:34,359 INFO L175 Difference]: Start difference. First operand has 275 places, 254 transitions, 2788 flow. Second operand 9 states and 234 transitions. [2024-06-20 15:26:34,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 294 transitions, 3492 flow [2024-06-20 15:26:36,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 294 transitions, 3338 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:36,137 INFO L231 Difference]: Finished difference. Result has 277 places, 253 transitions, 2786 flow [2024-06-20 15:26:36,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2786, PETRI_PLACES=277, PETRI_TRANSITIONS=253} [2024-06-20 15:26:36,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 15:26:36,138 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 253 transitions, 2786 flow [2024-06-20 15:26:36,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:36,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:36,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:36,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:26:36,138 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 15:26:36,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash -607429770, now seen corresponding path program 13 times [2024-06-20 15:26:36,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:36,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046065141] [2024-06-20 15:26:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:36,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:36,227 INFO 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 15:26:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046065141] [2024-06-20 15:26:36,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046065141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:36,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:36,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386143034] [2024-06-20 15:26:36,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:36,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:36,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 253 transitions, 2786 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:36,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:36,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:36,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:36,954 INFO L124 PetriNetUnfolderBase]: 2738/4753 cut-off events. [2024-06-20 15:26:36,955 INFO L125 PetriNetUnfolderBase]: For 499239/499239 co-relation queries the response was YES. [2024-06-20 15:26:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28690 conditions, 4753 events. 2738/4753 cut-off events. For 499239/499239 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32339 event pairs, 848 based on Foata normal form. 30/4780 useless extension candidates. Maximal degree in co-relation 28567. Up to 3675 conditions per place. [2024-06-20 15:26:37,004 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 64 changer transitions 8/288 dead transitions. [2024-06-20 15:26:37,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 288 transitions, 3496 flow [2024-06-20 15:26:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:26:37,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-20 15:26:37,006 INFO L175 Difference]: Start difference. First operand has 277 places, 253 transitions, 2786 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:26:37,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 288 transitions, 3496 flow [2024-06-20 15:26:38,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 288 transitions, 3325 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:38,206 INFO L231 Difference]: Finished difference. Result has 275 places, 250 transitions, 2725 flow [2024-06-20 15:26:38,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=275, PETRI_TRANSITIONS=250} [2024-06-20 15:26:38,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-20 15:26:38,207 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 250 transitions, 2725 flow [2024-06-20 15:26:38,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:38,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:38,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:38,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:26:38,207 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 15:26:38,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -960748682, now seen corresponding path program 14 times [2024-06-20 15:26:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373104121] [2024-06-20 15:26:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:38,290 INFO 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 15:26:38,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:38,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373104121] [2024-06-20 15:26:38,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373104121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988371031] [2024-06-20 15:26:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:38,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:38,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:38,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 250 transitions, 2725 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:38,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:38,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:38,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:38,980 INFO L124 PetriNetUnfolderBase]: 2630/4583 cut-off events. [2024-06-20 15:26:38,980 INFO L125 PetriNetUnfolderBase]: For 472736/472736 co-relation queries the response was YES. [2024-06-20 15:26:39,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27371 conditions, 4583 events. 2630/4583 cut-off events. For 472736/472736 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31091 event pairs, 664 based on Foata normal form. 30/4610 useless extension candidates. Maximal degree in co-relation 27248. Up to 2120 conditions per place. [2024-06-20 15:26:39,028 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 203 selfloop transitions, 68 changer transitions 11/290 dead transitions. [2024-06-20 15:26:39,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 290 transitions, 3653 flow [2024-06-20 15:26:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-20 15:26:39,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-20 15:26:39,029 INFO L175 Difference]: Start difference. First operand has 275 places, 250 transitions, 2725 flow. Second operand 7 states and 190 transitions. [2024-06-20 15:26:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 290 transitions, 3653 flow [2024-06-20 15:26:40,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 290 transitions, 3466 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:40,209 INFO L231 Difference]: Finished difference. Result has 274 places, 245 transitions, 2630 flow [2024-06-20 15:26:40,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2630, PETRI_PLACES=274, PETRI_TRANSITIONS=245} [2024-06-20 15:26:40,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 15:26:40,210 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 245 transitions, 2630 flow [2024-06-20 15:26:40,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:40,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:40,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:40,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:26:40,211 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 15:26:40,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -855205616, now seen corresponding path program 15 times [2024-06-20 15:26:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490972564] [2024-06-20 15:26:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:40,296 INFO 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 15:26:40,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490972564] [2024-06-20 15:26:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490972564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:40,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:40,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:40,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79672764] [2024-06-20 15:26:40,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:40,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:40,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:40,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 245 transitions, 2630 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:40,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:40,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:40,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:40,973 INFO L124 PetriNetUnfolderBase]: 2402/4190 cut-off events. [2024-06-20 15:26:40,973 INFO L125 PetriNetUnfolderBase]: For 350172/350172 co-relation queries the response was YES. [2024-06-20 15:26:41,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22918 conditions, 4190 events. 2402/4190 cut-off events. For 350172/350172 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28012 event pairs, 637 based on Foata normal form. 30/4216 useless extension candidates. Maximal degree in co-relation 22795. Up to 3004 conditions per place. [2024-06-20 15:26:41,017 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 200 selfloop transitions, 77 changer transitions 6/291 dead transitions. [2024-06-20 15:26:41,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 291 transitions, 3374 flow [2024-06-20 15:26:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:26:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:26:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-20 15:26:41,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-20 15:26:41,018 INFO L175 Difference]: Start difference. First operand has 274 places, 245 transitions, 2630 flow. Second operand 9 states and 236 transitions. [2024-06-20 15:26:41,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 291 transitions, 3374 flow [2024-06-20 15:26:41,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 291 transitions, 3194 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:41,921 INFO L231 Difference]: Finished difference. Result has 275 places, 244 transitions, 2599 flow [2024-06-20 15:26:41,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2599, PETRI_PLACES=275, PETRI_TRANSITIONS=244} [2024-06-20 15:26:41,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-20 15:26:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 244 transitions, 2599 flow [2024-06-20 15:26:41,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:41,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:41,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:41,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:26:41,922 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 15:26:41,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:41,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1754781842, now seen corresponding path program 1 times [2024-06-20 15:26:41,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857072908] [2024-06-20 15:26:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:42,005 INFO 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 15:26:42,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:42,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857072908] [2024-06-20 15:26:42,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857072908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:42,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:42,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778460786] [2024-06-20 15:26:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:42,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:42,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 244 transitions, 2599 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:42,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:42,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:42,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:42,657 INFO L124 PetriNetUnfolderBase]: 2501/4397 cut-off events. [2024-06-20 15:26:42,657 INFO L125 PetriNetUnfolderBase]: For 372146/372146 co-relation queries the response was YES. [2024-06-20 15:26:42,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25011 conditions, 4397 events. 2501/4397 cut-off events. For 372146/372146 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29653 event pairs, 480 based on Foata normal form. 18/4412 useless extension candidates. Maximal degree in co-relation 24888. Up to 2230 conditions per place. [2024-06-20 15:26:42,703 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 180 selfloop transitions, 83 changer transitions 15/286 dead transitions. [2024-06-20 15:26:42,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 286 transitions, 3707 flow [2024-06-20 15:26:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:26:42,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-20 15:26:42,704 INFO L175 Difference]: Start difference. First operand has 275 places, 244 transitions, 2599 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:26:42,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 286 transitions, 3707 flow [2024-06-20 15:26:43,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 286 transitions, 3488 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-20 15:26:43,997 INFO L231 Difference]: Finished difference. Result has 273 places, 242 transitions, 2535 flow [2024-06-20 15:26:43,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=273, PETRI_TRANSITIONS=242} [2024-06-20 15:26:43,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-20 15:26:43,998 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 242 transitions, 2535 flow [2024-06-20 15:26:43,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:43,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:43,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:26:43,999 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 15:26:43,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:43,999 INFO L85 PathProgramCache]: Analyzing trace with hash 152968730, now seen corresponding path program 2 times [2024-06-20 15:26:43,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:43,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772105135] [2024-06-20 15:26:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:43,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772105135] [2024-06-20 15:26:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772105135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:44,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:44,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662450091] [2024-06-20 15:26:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:44,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 242 transitions, 2535 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:44,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:44,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:44,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:44,834 INFO L124 PetriNetUnfolderBase]: 2550/4483 cut-off events. [2024-06-20 15:26:44,834 INFO L125 PetriNetUnfolderBase]: For 425584/425584 co-relation queries the response was YES. [2024-06-20 15:26:44,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26688 conditions, 4483 events. 2550/4483 cut-off events. For 425584/425584 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 30454 event pairs, 715 based on Foata normal form. 18/4498 useless extension candidates. Maximal degree in co-relation 26565. Up to 3573 conditions per place. [2024-06-20 15:26:44,877 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 235 selfloop transitions, 23 changer transitions 8/274 dead transitions. [2024-06-20 15:26:44,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 274 transitions, 3387 flow [2024-06-20 15:26:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:26:44,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:26:44,878 INFO L175 Difference]: Start difference. First operand has 273 places, 242 transitions, 2535 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:26:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 274 transitions, 3387 flow [2024-06-20 15:26:46,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 274 transitions, 3213 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:46,064 INFO L231 Difference]: Finished difference. Result has 270 places, 240 transitions, 2393 flow [2024-06-20 15:26:46,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2393, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2024-06-20 15:26:46,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-20 15:26:46,065 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 2393 flow [2024-06-20 15:26:46,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:46,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:46,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:46,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:26:46,065 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 15:26:46,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash -723175216, now seen corresponding path program 3 times [2024-06-20 15:26:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:46,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989472426] [2024-06-20 15:26:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:46,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:46,153 INFO 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 15:26:46,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:46,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989472426] [2024-06-20 15:26:46,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989472426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:46,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:46,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:46,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104057566] [2024-06-20 15:26:46,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:46,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:46,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:46,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:46,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 2393 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:46,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:46,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:46,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:46,721 INFO L124 PetriNetUnfolderBase]: 2237/3928 cut-off events. [2024-06-20 15:26:46,721 INFO L125 PetriNetUnfolderBase]: For 182705/182705 co-relation queries the response was YES. [2024-06-20 15:26:46,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18898 conditions, 3928 events. 2237/3928 cut-off events. For 182705/182705 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25896 event pairs, 539 based on Foata normal form. 18/3943 useless extension candidates. Maximal degree in co-relation 18776. Up to 3233 conditions per place. [2024-06-20 15:26:46,759 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 217 selfloop transitions, 20 changer transitions 22/267 dead transitions. [2024-06-20 15:26:46,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 267 transitions, 3021 flow [2024-06-20 15:26:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:26:46,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:26:46,760 INFO L175 Difference]: Start difference. First operand has 270 places, 240 transitions, 2393 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:26:46,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 267 transitions, 3021 flow [2024-06-20 15:26:47,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 267 transitions, 2972 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:47,245 INFO L231 Difference]: Finished difference. Result has 269 places, 236 transitions, 2340 flow [2024-06-20 15:26:47,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2340, PETRI_PLACES=269, PETRI_TRANSITIONS=236} [2024-06-20 15:26:47,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-20 15:26:47,245 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 236 transitions, 2340 flow [2024-06-20 15:26:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:47,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:47,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:47,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:26:47,246 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 15:26:47,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:47,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1193574528, now seen corresponding path program 4 times [2024-06-20 15:26:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:47,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573240201] [2024-06-20 15:26:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:47,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:47,331 INFO 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 15:26:47,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573240201] [2024-06-20 15:26:47,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573240201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:47,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:47,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:47,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503600570] [2024-06-20 15:26:47,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:47,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:47,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:47,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:47,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 236 transitions, 2340 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:47,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:47,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:47,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:47,917 INFO L124 PetriNetUnfolderBase]: 2303/4013 cut-off events. [2024-06-20 15:26:47,917 INFO L125 PetriNetUnfolderBase]: For 296809/296809 co-relation queries the response was YES. [2024-06-20 15:26:47,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 4013 events. 2303/4013 cut-off events. For 296809/296809 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26601 event pairs, 514 based on Foata normal form. 24/4035 useless extension candidates. Maximal degree in co-relation 21307. Up to 2582 conditions per place. [2024-06-20 15:26:47,957 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 175 selfloop transitions, 74 changer transitions 10/267 dead transitions. [2024-06-20 15:26:47,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 267 transitions, 3192 flow [2024-06-20 15:26:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:26:47,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:26:47,958 INFO L175 Difference]: Start difference. First operand has 269 places, 236 transitions, 2340 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:26:47,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 267 transitions, 3192 flow [2024-06-20 15:26:48,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 267 transitions, 3134 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:48,681 INFO L231 Difference]: Finished difference. Result has 265 places, 232 transitions, 2385 flow [2024-06-20 15:26:48,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2385, PETRI_PLACES=265, PETRI_TRANSITIONS=232} [2024-06-20 15:26:48,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-20 15:26:48,682 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 232 transitions, 2385 flow [2024-06-20 15:26:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:48,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:48,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:48,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:26:48,682 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 15:26:48,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -545819400, now seen corresponding path program 5 times [2024-06-20 15:26:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:48,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424654599] [2024-06-20 15:26:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:48,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:48,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:48,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424654599] [2024-06-20 15:26:48,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424654599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:48,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:48,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468441623] [2024-06-20 15:26:48,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:48,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:48,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:48,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 232 transitions, 2385 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:48,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:48,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:48,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:49,329 INFO L124 PetriNetUnfolderBase]: 2202/3857 cut-off events. [2024-06-20 15:26:49,329 INFO L125 PetriNetUnfolderBase]: For 296889/296889 co-relation queries the response was YES. [2024-06-20 15:26:49,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20664 conditions, 3857 events. 2202/3857 cut-off events. For 296889/296889 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25422 event pairs, 734 based on Foata normal form. 26/3881 useless extension candidates. Maximal degree in co-relation 20543. Up to 3223 conditions per place. [2024-06-20 15:26:49,366 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 185 selfloop transitions, 50 changer transitions 6/249 dead transitions. [2024-06-20 15:26:49,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 249 transitions, 2939 flow [2024-06-20 15:26:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:26:49,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:26:49,368 INFO L175 Difference]: Start difference. First operand has 265 places, 232 transitions, 2385 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:26:49,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 249 transitions, 2939 flow [2024-06-20 15:26:50,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 249 transitions, 2768 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:50,111 INFO L231 Difference]: Finished difference. Result has 261 places, 228 transitions, 2294 flow [2024-06-20 15:26:50,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2294, PETRI_PLACES=261, PETRI_TRANSITIONS=228} [2024-06-20 15:26:50,111 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-20 15:26:50,111 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 228 transitions, 2294 flow [2024-06-20 15:26:50,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:50,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:50,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:50,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:26:50,112 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 15:26:50,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1329831298, now seen corresponding path program 6 times [2024-06-20 15:26:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:50,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960542023] [2024-06-20 15:26:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:50,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:50,197 INFO 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 15:26:50,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960542023] [2024-06-20 15:26:50,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960542023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:50,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:50,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:50,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792934386] [2024-06-20 15:26:50,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:50,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:50,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:50,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:50,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 228 transitions, 2294 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:50,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:50,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:50,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:50,715 INFO L124 PetriNetUnfolderBase]: 2073/3640 cut-off events. [2024-06-20 15:26:50,715 INFO L125 PetriNetUnfolderBase]: For 194667/194667 co-relation queries the response was YES. [2024-06-20 15:26:50,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17552 conditions, 3640 events. 2073/3640 cut-off events. For 194667/194667 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23812 event pairs, 596 based on Foata normal form. 24/3662 useless extension candidates. Maximal degree in co-relation 17432. Up to 2921 conditions per place. [2024-06-20 15:26:50,749 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 181 selfloop transitions, 52 changer transitions 10/251 dead transitions. [2024-06-20 15:26:50,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 251 transitions, 2898 flow [2024-06-20 15:26:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:26:50,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:26:50,751 INFO L175 Difference]: Start difference. First operand has 261 places, 228 transitions, 2294 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:26:50,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 251 transitions, 2898 flow [2024-06-20 15:26:51,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 251 transitions, 2787 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:51,247 INFO L231 Difference]: Finished difference. Result has 260 places, 223 transitions, 2248 flow [2024-06-20 15:26:51,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2248, PETRI_PLACES=260, PETRI_TRANSITIONS=223} [2024-06-20 15:26:51,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-20 15:26:51,248 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 223 transitions, 2248 flow [2024-06-20 15:26:51,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:51,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:51,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:26:51,249 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 15:26:51,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash -420016520, now seen corresponding path program 7 times [2024-06-20 15:26:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:51,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036321697] [2024-06-20 15:26:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:51,337 INFO 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 15:26:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036321697] [2024-06-20 15:26:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036321697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:51,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:51,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:51,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130410863] [2024-06-20 15:26:51,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:51,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:51,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:51,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 223 transitions, 2248 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:51,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:51,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:51,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:51,876 INFO L124 PetriNetUnfolderBase]: 2097/3693 cut-off events. [2024-06-20 15:26:51,876 INFO L125 PetriNetUnfolderBase]: For 237207/237207 co-relation queries the response was YES. [2024-06-20 15:26:51,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19161 conditions, 3693 events. 2097/3693 cut-off events. For 237207/237207 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24135 event pairs, 353 based on Foata normal form. 18/3709 useless extension candidates. Maximal degree in co-relation 19041. Up to 2425 conditions per place. [2024-06-20 15:26:51,912 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 180 selfloop transitions, 57 changer transitions 8/253 dead transitions. [2024-06-20 15:26:51,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 253 transitions, 3046 flow [2024-06-20 15:26:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:26:51,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-20 15:26:51,913 INFO L175 Difference]: Start difference. First operand has 260 places, 223 transitions, 2248 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:26:51,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 253 transitions, 3046 flow [2024-06-20 15:26:52,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 253 transitions, 2865 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-20 15:26:52,756 INFO L231 Difference]: Finished difference. Result has 255 places, 221 transitions, 2172 flow [2024-06-20 15:26:52,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2172, PETRI_PLACES=255, PETRI_TRANSITIONS=221} [2024-06-20 15:26:52,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-20 15:26:52,757 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 221 transitions, 2172 flow [2024-06-20 15:26:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:52,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:52,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:26:52,758 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 15:26:52,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -419809130, now seen corresponding path program 8 times [2024-06-20 15:26:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535295605] [2024-06-20 15:26:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:52,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:52,847 INFO 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 15:26:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535295605] [2024-06-20 15:26:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535295605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:52,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:52,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687786104] [2024-06-20 15:26:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:52,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:52,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:52,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 221 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:52,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:52,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:53,382 INFO L124 PetriNetUnfolderBase]: 1932/3404 cut-off events. [2024-06-20 15:26:53,382 INFO L125 PetriNetUnfolderBase]: For 163039/163039 co-relation queries the response was YES. [2024-06-20 15:26:53,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15917 conditions, 3404 events. 1932/3404 cut-off events. For 163039/163039 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22021 event pairs, 359 based on Foata normal form. 18/3420 useless extension candidates. Maximal degree in co-relation 15799. Up to 2425 conditions per place. [2024-06-20 15:26:53,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 171 selfloop transitions, 55 changer transitions 15/249 dead transitions. [2024-06-20 15:26:53,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 249 transitions, 2768 flow [2024-06-20 15:26:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:26:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:26:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:26:53,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:26:53,415 INFO L175 Difference]: Start difference. First operand has 255 places, 221 transitions, 2172 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:26:53,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 249 transitions, 2768 flow [2024-06-20 15:26:53,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 249 transitions, 2652 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:53,961 INFO L231 Difference]: Finished difference. Result has 254 places, 214 transitions, 2093 flow [2024-06-20 15:26:53,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2093, PETRI_PLACES=254, PETRI_TRANSITIONS=214} [2024-06-20 15:26:53,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-20 15:26:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 214 transitions, 2093 flow [2024-06-20 15:26:53,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:53,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:53,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:26:53,962 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 15:26:53,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash -188493150, now seen corresponding path program 9 times [2024-06-20 15:26:53,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375496522] [2024-06-20 15:26:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:54,043 INFO 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 15:26:54,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:54,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375496522] [2024-06-20 15:26:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375496522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:54,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:54,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:54,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31625604] [2024-06-20 15:26:54,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:54,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:54,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:54,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 214 transitions, 2093 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:54,556 INFO L124 PetriNetUnfolderBase]: 2016/3530 cut-off events. [2024-06-20 15:26:54,556 INFO L125 PetriNetUnfolderBase]: For 266047/266047 co-relation queries the response was YES. [2024-06-20 15:26:54,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18307 conditions, 3530 events. 2016/3530 cut-off events. For 266047/266047 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22820 event pairs, 592 based on Foata normal form. 24/3548 useless extension candidates. Maximal degree in co-relation 18189. Up to 1887 conditions per place. [2024-06-20 15:26:54,593 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 147 selfloop transitions, 71 changer transitions 23/249 dead transitions. [2024-06-20 15:26:54,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 249 transitions, 2901 flow [2024-06-20 15:26:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:26:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:26:54,594 INFO L175 Difference]: Start difference. First operand has 254 places, 214 transitions, 2093 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:26:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 249 transitions, 2901 flow [2024-06-20 15:26:55,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 249 transitions, 2747 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:26:55,471 INFO L231 Difference]: Finished difference. Result has 246 places, 206 transitions, 2001 flow [2024-06-20 15:26:55,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2001, PETRI_PLACES=246, PETRI_TRANSITIONS=206} [2024-06-20 15:26:55,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-20 15:26:55,472 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 206 transitions, 2001 flow [2024-06-20 15:26:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:55,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:55,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:55,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:26:55,472 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 15:26:55,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 47835970, now seen corresponding path program 1 times [2024-06-20 15:26:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:55,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114311200] [2024-06-20 15:26:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:55,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114311200] [2024-06-20 15:26:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114311200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:55,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:55,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896963895] [2024-06-20 15:26:55,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:55,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:55,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:55,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:55,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:55,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 206 transitions, 2001 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:55,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:55,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:55,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:56,044 INFO L124 PetriNetUnfolderBase]: 1951/3431 cut-off events. [2024-06-20 15:26:56,045 INFO L125 PetriNetUnfolderBase]: For 345766/345766 co-relation queries the response was YES. [2024-06-20 15:26:56,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19654 conditions, 3431 events. 1951/3431 cut-off events. For 345766/345766 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22227 event pairs, 649 based on Foata normal form. 24/3449 useless extension candidates. Maximal degree in co-relation 19540. Up to 2530 conditions per place. [2024-06-20 15:26:56,080 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 144 selfloop transitions, 69 changer transitions 13/234 dead transitions. [2024-06-20 15:26:56,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 234 transitions, 2739 flow [2024-06-20 15:26:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:26:56,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:26:56,081 INFO L175 Difference]: Start difference. First operand has 246 places, 206 transitions, 2001 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:26:56,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 234 transitions, 2739 flow [2024-06-20 15:26:56,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 234 transitions, 2595 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:56,920 INFO L231 Difference]: Finished difference. Result has 241 places, 200 transitions, 1955 flow [2024-06-20 15:26:56,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1955, PETRI_PLACES=241, PETRI_TRANSITIONS=200} [2024-06-20 15:26:56,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 15:26:56,921 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 200 transitions, 1955 flow [2024-06-20 15:26:56,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:56,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:56,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:56,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:26:56,921 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 15:26:56,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash -21674856, now seen corresponding path program 2 times [2024-06-20 15:26:56,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:56,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253080216] [2024-06-20 15:26:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:56,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:57,003 INFO 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 15:26:57,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:57,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253080216] [2024-06-20 15:26:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253080216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:57,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:57,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:57,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388427280] [2024-06-20 15:26:57,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:57,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:57,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:57,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 200 transitions, 1955 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:57,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:57,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:57,480 INFO L124 PetriNetUnfolderBase]: 1768/3126 cut-off events. [2024-06-20 15:26:57,480 INFO L125 PetriNetUnfolderBase]: For 251906/251906 co-relation queries the response was YES. [2024-06-20 15:26:57,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16096 conditions, 3126 events. 1768/3126 cut-off events. For 251906/251906 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20019 event pairs, 600 based on Foata normal form. 26/3146 useless extension candidates. Maximal degree in co-relation 15984. Up to 2530 conditions per place. [2024-06-20 15:26:57,506 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 62 changer transitions 21/221 dead transitions. [2024-06-20 15:26:57,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 221 transitions, 2457 flow [2024-06-20 15:26:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:26:57,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:26:57,507 INFO L175 Difference]: Start difference. First operand has 241 places, 200 transitions, 1955 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:26:57,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 221 transitions, 2457 flow [2024-06-20 15:26:58,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 221 transitions, 2316 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:58,129 INFO L231 Difference]: Finished difference. Result has 238 places, 191 transitions, 1867 flow [2024-06-20 15:26:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1867, PETRI_PLACES=238, PETRI_TRANSITIONS=191} [2024-06-20 15:26:58,130 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-20 15:26:58,130 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 191 transitions, 1867 flow [2024-06-20 15:26:58,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:58,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:58,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:26:58,131 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 15:26:58,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash 553089628, now seen corresponding path program 3 times [2024-06-20 15:26:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:58,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156139133] [2024-06-20 15:26:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:58,207 INFO 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 15:26:58,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156139133] [2024-06-20 15:26:58,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156139133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:58,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:58,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234014507] [2024-06-20 15:26:58,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:58,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:58,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:58,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 191 transitions, 1867 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:58,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:58,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:58,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:58,656 INFO L124 PetriNetUnfolderBase]: 1802/3187 cut-off events. [2024-06-20 15:26:58,656 INFO L125 PetriNetUnfolderBase]: For 270203/270203 co-relation queries the response was YES. [2024-06-20 15:26:58,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17440 conditions, 3187 events. 1802/3187 cut-off events. For 270203/270203 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20552 event pairs, 364 based on Foata normal form. 18/3204 useless extension candidates. Maximal degree in co-relation 17330. Up to 1082 conditions per place. [2024-06-20 15:26:58,685 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 71 changer transitions 22/227 dead transitions. [2024-06-20 15:26:58,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 227 transitions, 2767 flow [2024-06-20 15:26:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:26:58,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:26:58,686 INFO L175 Difference]: Start difference. First operand has 238 places, 191 transitions, 1867 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:26:58,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 227 transitions, 2767 flow [2024-06-20 15:26:59,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 227 transitions, 2611 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:59,271 INFO L231 Difference]: Finished difference. Result has 229 places, 182 transitions, 1775 flow [2024-06-20 15:26:59,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=229, PETRI_TRANSITIONS=182} [2024-06-20 15:26:59,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 15:26:59,272 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 182 transitions, 1775 flow [2024-06-20 15:26:59,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:59,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:59,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:59,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:26:59,272 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 15:26:59,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash 848308828, now seen corresponding path program 4 times [2024-06-20 15:26:59,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:59,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094348054] [2024-06-20 15:26:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:59,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:59,349 INFO 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 15:26:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094348054] [2024-06-20 15:26:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094348054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:59,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:59,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:59,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177976685] [2024-06-20 15:26:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:59,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:59,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:26:59,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 182 transitions, 1775 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:59,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:59,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:26:59,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:59,750 INFO L124 PetriNetUnfolderBase]: 1670/2957 cut-off events. [2024-06-20 15:26:59,751 INFO L125 PetriNetUnfolderBase]: For 301016/301016 co-relation queries the response was YES. [2024-06-20 15:26:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17769 conditions, 2957 events. 1670/2957 cut-off events. For 301016/301016 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18947 event pairs, 516 based on Foata normal form. 18/2974 useless extension candidates. Maximal degree in co-relation 17662. Up to 1648 conditions per place. [2024-06-20 15:26:59,779 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 134 selfloop transitions, 58 changer transitions 14/214 dead transitions. [2024-06-20 15:26:59,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 214 transitions, 2615 flow [2024-06-20 15:26:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:26:59,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:26:59,780 INFO L175 Difference]: Start difference. First operand has 229 places, 182 transitions, 1775 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:26:59,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 214 transitions, 2615 flow [2024-06-20 15:27:00,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 214 transitions, 2455 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:00,262 INFO L231 Difference]: Finished difference. Result has 221 places, 174 transitions, 1693 flow [2024-06-20 15:27:00,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=221, PETRI_TRANSITIONS=174} [2024-06-20 15:27:00,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 15:27:00,262 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 174 transitions, 1693 flow [2024-06-20 15:27:00,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:00,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:00,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:00,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:27:00,263 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 15:27:00,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1279959864, now seen corresponding path program 5 times [2024-06-20 15:27:00,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:00,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790948822] [2024-06-20 15:27:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:00,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:00,341 INFO 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 15:27:00,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790948822] [2024-06-20 15:27:00,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790948822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:00,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:00,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014326137] [2024-06-20 15:27:00,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:00,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:00,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:00,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 174 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:00,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:00,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:00,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:00,697 INFO L124 PetriNetUnfolderBase]: 1493/2650 cut-off events. [2024-06-20 15:27:00,698 INFO L125 PetriNetUnfolderBase]: For 229921/229921 co-relation queries the response was YES. [2024-06-20 15:27:00,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14936 conditions, 2650 events. 1493/2650 cut-off events. For 229921/229921 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16588 event pairs, 504 based on Foata normal form. 18/2667 useless extension candidates. Maximal degree in co-relation 14832. Up to 1648 conditions per place. [2024-06-20 15:27:00,720 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 50 changer transitions 29/201 dead transitions. [2024-06-20 15:27:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 201 transitions, 2319 flow [2024-06-20 15:27:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:27:00,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:27:00,722 INFO L175 Difference]: Start difference. First operand has 221 places, 174 transitions, 1693 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:27:00,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 201 transitions, 2319 flow [2024-06-20 15:27:01,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 201 transitions, 2169 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-20 15:27:01,204 INFO L231 Difference]: Finished difference. Result has 213 places, 160 transitions, 1515 flow [2024-06-20 15:27:01,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1515, PETRI_PLACES=213, PETRI_TRANSITIONS=160} [2024-06-20 15:27:01,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:27:01,204 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 160 transitions, 1515 flow [2024-06-20 15:27:01,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:01,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:01,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:01,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:27:01,205 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 15:27:01,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:01,205 INFO L85 PathProgramCache]: Analyzing trace with hash 285645634, now seen corresponding path program 6 times [2024-06-20 15:27:01,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:01,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898426270] [2024-06-20 15:27:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:01,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:01,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:01,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898426270] [2024-06-20 15:27:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898426270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:01,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66853640] [2024-06-20 15:27:01,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:01,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:01,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 160 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:01,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:01,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:01,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:01,659 INFO L124 PetriNetUnfolderBase]: 1547/2717 cut-off events. [2024-06-20 15:27:01,659 INFO L125 PetriNetUnfolderBase]: For 279224/279224 co-relation queries the response was YES. [2024-06-20 15:27:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16494 conditions, 2717 events. 1547/2717 cut-off events. For 279224/279224 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17121 event pairs, 574 based on Foata normal form. 24/2740 useless extension candidates. Maximal degree in co-relation 16395. Up to 1861 conditions per place. [2024-06-20 15:27:01,682 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 107 selfloop transitions, 51 changer transitions 16/182 dead transitions. [2024-06-20 15:27:01,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 182 transitions, 2093 flow [2024-06-20 15:27:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:27:01,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:27:01,683 INFO L175 Difference]: Start difference. First operand has 213 places, 160 transitions, 1515 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:27:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 182 transitions, 2093 flow [2024-06-20 15:27:02,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 182 transitions, 1992 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-20 15:27:02,081 INFO L231 Difference]: Finished difference. Result has 196 places, 151 transitions, 1448 flow [2024-06-20 15:27:02,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1448, PETRI_PLACES=196, PETRI_TRANSITIONS=151} [2024-06-20 15:27:02,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 15:27:02,081 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 151 transitions, 1448 flow [2024-06-20 15:27:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:02,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:02,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:02,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:27:02,082 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 15:27:02,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1246690974, now seen corresponding path program 7 times [2024-06-20 15:27:02,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:02,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697103271] [2024-06-20 15:27:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:02,161 INFO 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 15:27:02,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:02,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697103271] [2024-06-20 15:27:02,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697103271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:02,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418398474] [2024-06-20 15:27:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:02,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:02,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:02,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:02,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:02,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 151 transitions, 1448 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:02,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:02,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:02,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:02,485 INFO L124 PetriNetUnfolderBase]: 1459/2573 cut-off events. [2024-06-20 15:27:02,486 INFO L125 PetriNetUnfolderBase]: For 237457/237457 co-relation queries the response was YES. [2024-06-20 15:27:02,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15385 conditions, 2573 events. 1459/2573 cut-off events. For 237457/237457 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16064 event pairs, 598 based on Foata normal form. 26/2598 useless extension candidates. Maximal degree in co-relation 15293. Up to 2072 conditions per place. [2024-06-20 15:27:02,507 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 45 changer transitions 17/166 dead transitions. [2024-06-20 15:27:02,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 166 transitions, 1820 flow [2024-06-20 15:27:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:27:02,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:27:02,508 INFO L175 Difference]: Start difference. First operand has 196 places, 151 transitions, 1448 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:27:02,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 166 transitions, 1820 flow [2024-06-20 15:27:02,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 166 transitions, 1710 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-20 15:27:02,806 INFO L231 Difference]: Finished difference. Result has 188 places, 142 transitions, 1364 flow [2024-06-20 15:27:02,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1364, PETRI_PLACES=188, PETRI_TRANSITIONS=142} [2024-06-20 15:27:02,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-20 15:27:02,806 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 142 transitions, 1364 flow [2024-06-20 15:27:02,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:02,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:02,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:02,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:27:02,807 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 15:27:02,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 634758334, now seen corresponding path program 8 times [2024-06-20 15:27:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:02,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053617103] [2024-06-20 15:27:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:02,885 INFO 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 15:27:02,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:02,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053617103] [2024-06-20 15:27:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053617103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:02,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024301298] [2024-06-20 15:27:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:02,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:02,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 142 transitions, 1364 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:02,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:02,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:02,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:03,225 INFO L124 PetriNetUnfolderBase]: 1437/2543 cut-off events. [2024-06-20 15:27:03,225 INFO L125 PetriNetUnfolderBase]: For 191196/191196 co-relation queries the response was YES. [2024-06-20 15:27:03,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14649 conditions, 2543 events. 1437/2543 cut-off events. For 191196/191196 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15884 event pairs, 562 based on Foata normal form. 24/2566 useless extension candidates. Maximal degree in co-relation 14563. Up to 1813 conditions per place. [2024-06-20 15:27:03,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 101 selfloop transitions, 45 changer transitions 10/164 dead transitions. [2024-06-20 15:27:03,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 164 transitions, 1882 flow [2024-06-20 15:27:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:27:03,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:27:03,248 INFO L175 Difference]: Start difference. First operand has 188 places, 142 transitions, 1364 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:27:03,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 164 transitions, 1882 flow [2024-06-20 15:27:03,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 164 transitions, 1772 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-20 15:27:03,468 INFO L231 Difference]: Finished difference. Result has 180 places, 139 transitions, 1330 flow [2024-06-20 15:27:03,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=180, PETRI_TRANSITIONS=139} [2024-06-20 15:27:03,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-20 15:27:03,469 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 139 transitions, 1330 flow [2024-06-20 15:27:03,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:03,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:03,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:27:03,469 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 15:27:03,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1034933852, now seen corresponding path program 9 times [2024-06-20 15:27:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:03,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807879639] [2024-06-20 15:27:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:03,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:03,566 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 15:27:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:03,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807879639] [2024-06-20 15:27:03,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807879639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:03,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:03,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:03,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559511123] [2024-06-20 15:27:03,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:03,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:03,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:03,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 139 transitions, 1330 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:03,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:03,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:03,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:03,898 INFO L124 PetriNetUnfolderBase]: 1466/2610 cut-off events. [2024-06-20 15:27:03,899 INFO L125 PetriNetUnfolderBase]: For 181676/181676 co-relation queries the response was YES. [2024-06-20 15:27:03,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 2610 events. 1466/2610 cut-off events. For 181676/181676 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16503 event pairs, 546 based on Foata normal form. 18/2627 useless extension candidates. Maximal degree in co-relation 15179. Up to 1589 conditions per place. [2024-06-20 15:27:03,920 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 101 selfloop transitions, 43 changer transitions 14/166 dead transitions. [2024-06-20 15:27:03,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 166 transitions, 1962 flow [2024-06-20 15:27:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:27:03,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:27:03,921 INFO L175 Difference]: Start difference. First operand has 180 places, 139 transitions, 1330 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:27:03,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 166 transitions, 1962 flow [2024-06-20 15:27:04,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 166 transitions, 1863 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:04,138 INFO L231 Difference]: Finished difference. Result has 179 places, 131 transitions, 1263 flow [2024-06-20 15:27:04,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1263, PETRI_PLACES=179, PETRI_TRANSITIONS=131} [2024-06-20 15:27:04,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-20 15:27:04,138 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 131 transitions, 1263 flow [2024-06-20 15:27:04,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:04,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:04,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:27:04,139 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 15:27:04,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash 291220054, now seen corresponding path program 10 times [2024-06-20 15:27:04,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:04,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821913325] [2024-06-20 15:27:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:04,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:04,219 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 15:27:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821913325] [2024-06-20 15:27:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821913325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:04,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:04,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711556969] [2024-06-20 15:27:04,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:04,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:04,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:04,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 131 transitions, 1263 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:04,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:04,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:04,533 INFO L124 PetriNetUnfolderBase]: 1289/2303 cut-off events. [2024-06-20 15:27:04,533 INFO L125 PetriNetUnfolderBase]: For 151366/151366 co-relation queries the response was YES. [2024-06-20 15:27:04,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13274 conditions, 2303 events. 1289/2303 cut-off events. For 151366/151366 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14235 event pairs, 528 based on Foata normal form. 18/2320 useless extension candidates. Maximal degree in co-relation 13193. Up to 1589 conditions per place. [2024-06-20 15:27:04,553 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 89 selfloop transitions, 38 changer transitions 20/155 dead transitions. [2024-06-20 15:27:04,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 155 transitions, 1755 flow [2024-06-20 15:27:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:27:04,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:27:04,554 INFO L175 Difference]: Start difference. First operand has 179 places, 131 transitions, 1263 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:27:04,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 155 transitions, 1755 flow [2024-06-20 15:27:04,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 155 transitions, 1650 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-20 15:27:04,724 INFO L231 Difference]: Finished difference. Result has 172 places, 121 transitions, 1170 flow [2024-06-20 15:27:04,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1170, PETRI_PLACES=172, PETRI_TRANSITIONS=121} [2024-06-20 15:27:04,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 15:27:04,740 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 121 transitions, 1170 flow [2024-06-20 15:27:04,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:04,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:27:04,741 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 15:27:04,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 295624534, now seen corresponding path program 11 times [2024-06-20 15:27:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582771196] [2024-06-20 15:27:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:04,839 INFO 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 15:27:04,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582771196] [2024-06-20 15:27:04,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582771196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:04,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:04,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137827702] [2024-06-20 15:27:04,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:04,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:04,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:04,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 121 transitions, 1170 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:04,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:04,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:05,108 INFO L124 PetriNetUnfolderBase]: 1142/2042 cut-off events. [2024-06-20 15:27:05,109 INFO L125 PetriNetUnfolderBase]: For 109563/109563 co-relation queries the response was YES. [2024-06-20 15:27:05,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10824 conditions, 2042 events. 1142/2042 cut-off events. For 109563/109563 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12248 event pairs, 485 based on Foata normal form. 26/2067 useless extension candidates. Maximal degree in co-relation 10747. Up to 1589 conditions per place. [2024-06-20 15:27:05,121 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 30 changer transitions 27/136 dead transitions. [2024-06-20 15:27:05,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 136 transitions, 1482 flow [2024-06-20 15:27:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-20 15:27:05,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-20 15:27:05,122 INFO L175 Difference]: Start difference. First operand has 172 places, 121 transitions, 1170 flow. Second operand 8 states and 174 transitions. [2024-06-20 15:27:05,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 136 transitions, 1482 flow [2024-06-20 15:27:05,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 136 transitions, 1395 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:27:05,211 INFO L231 Difference]: Finished difference. Result has 160 places, 107 transitions, 1020 flow [2024-06-20 15:27:05,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=160, PETRI_TRANSITIONS=107} [2024-06-20 15:27:05,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-20 15:27:05,212 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 107 transitions, 1020 flow [2024-06-20 15:27:05,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:05,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:05,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:27:05,213 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 15:27:05,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1406457900, now seen corresponding path program 12 times [2024-06-20 15:27:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017611364] [2024-06-20 15:27:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:05,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:05,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:05,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017611364] [2024-06-20 15:27:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017611364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525772083] [2024-06-20 15:27:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:05,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:05,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 107 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:05,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:05,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:05,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:05,579 INFO L124 PetriNetUnfolderBase]: 1233/2159 cut-off events. [2024-06-20 15:27:05,579 INFO L125 PetriNetUnfolderBase]: For 104765/104765 co-relation queries the response was YES. [2024-06-20 15:27:05,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11791 conditions, 2159 events. 1233/2159 cut-off events. For 104765/104765 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13072 event pairs, 524 based on Foata normal form. 24/2182 useless extension candidates. Maximal degree in co-relation 11720. Up to 1503 conditions per place. [2024-06-20 15:27:05,593 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 38 changer transitions 10/127 dead transitions. [2024-06-20 15:27:05,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 127 transitions, 1428 flow [2024-06-20 15:27:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 15:27:05,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:27:05,595 INFO L175 Difference]: Start difference. First operand has 160 places, 107 transitions, 1020 flow. Second operand 9 states and 198 transitions. [2024-06-20 15:27:05,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 127 transitions, 1428 flow [2024-06-20 15:27:05,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 127 transitions, 1320 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-20 15:27:05,683 INFO L231 Difference]: Finished difference. Result has 141 places, 104 transitions, 969 flow [2024-06-20 15:27:05,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=969, PETRI_PLACES=141, PETRI_TRANSITIONS=104} [2024-06-20 15:27:05,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-20 15:27:05,683 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 104 transitions, 969 flow [2024-06-20 15:27:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:05,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:05,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:05,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:27:05,684 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 15:27:05,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 188509828, now seen corresponding path program 1 times [2024-06-20 15:27:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896851292] [2024-06-20 15:27:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:05,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896851292] [2024-06-20 15:27:05,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896851292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:05,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:05,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:05,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980392070] [2024-06-20 15:27:05,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:05,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:05,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:05,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:05,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:05,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 104 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:05,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:05,982 INFO L124 PetriNetUnfolderBase]: 1066/1870 cut-off events. [2024-06-20 15:27:05,983 INFO L125 PetriNetUnfolderBase]: For 62684/62692 co-relation queries the response was YES. [2024-06-20 15:27:05,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 1870 events. 1066/1870 cut-off events. For 62684/62692 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10912 event pairs, 475 based on Foata normal form. 34/1903 useless extension candidates. Maximal degree in co-relation 9214. Up to 1503 conditions per place. [2024-06-20 15:27:05,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 61 selfloop transitions, 34 changer transitions 14/117 dead transitions. [2024-06-20 15:27:05,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 117 transitions, 1237 flow [2024-06-20 15:27:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-20 15:27:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-20 15:27:05,995 INFO L175 Difference]: Start difference. First operand has 141 places, 104 transitions, 969 flow. Second operand 9 states and 190 transitions. [2024-06-20 15:27:05,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 117 transitions, 1237 flow [2024-06-20 15:27:06,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 117 transitions, 1160 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:06,053 INFO L231 Difference]: Finished difference. Result has 140 places, 99 transitions, 923 flow [2024-06-20 15:27:06,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=923, PETRI_PLACES=140, PETRI_TRANSITIONS=99} [2024-06-20 15:27:06,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-20 15:27:06,054 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 99 transitions, 923 flow [2024-06-20 15:27:06,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:06,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:06,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:27:06,054 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 15:27:06,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2032885762, now seen corresponding path program 2 times [2024-06-20 15:27:06,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:06,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055579808] [2024-06-20 15:27:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:06,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:06,159 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 15:27:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:06,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055579808] [2024-06-20 15:27:06,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055579808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914560410] [2024-06-20 15:27:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:06,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:06,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:06,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 99 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:06,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:06,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:06,395 INFO L124 PetriNetUnfolderBase]: 1057/1857 cut-off events. [2024-06-20 15:27:06,395 INFO L125 PetriNetUnfolderBase]: For 59435/59435 co-relation queries the response was YES. [2024-06-20 15:27:06,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9126 conditions, 1857 events. 1057/1857 cut-off events. For 59435/59435 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10913 event pairs, 487 based on Foata normal form. 26/1882 useless extension candidates. Maximal degree in co-relation 9064. Up to 1497 conditions per place. [2024-06-20 15:27:06,407 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 27 changer transitions 12/110 dead transitions. [2024-06-20 15:27:06,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 110 transitions, 1173 flow [2024-06-20 15:27:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 15:27:06,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:27:06,408 INFO L175 Difference]: Start difference. First operand has 140 places, 99 transitions, 923 flow. Second operand 7 states and 154 transitions. [2024-06-20 15:27:06,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 110 transitions, 1173 flow [2024-06-20 15:27:06,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 110 transitions, 1099 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:06,466 INFO L231 Difference]: Finished difference. Result has 133 places, 95 transitions, 876 flow [2024-06-20 15:27:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=133, PETRI_TRANSITIONS=95} [2024-06-20 15:27:06,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-20 15:27:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 95 transitions, 876 flow [2024-06-20 15:27:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:27:06,467 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 15:27:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1625730836, now seen corresponding path program 3 times [2024-06-20 15:27:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512384552] [2024-06-20 15:27:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:06,556 INFO 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 15:27:06,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512384552] [2024-06-20 15:27:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512384552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76474645] [2024-06-20 15:27:06,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:06,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:06,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:06,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 95 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:06,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:06,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:06,867 INFO L124 PetriNetUnfolderBase]: 1298/2282 cut-off events. [2024-06-20 15:27:06,867 INFO L125 PetriNetUnfolderBase]: For 80116/80116 co-relation queries the response was YES. [2024-06-20 15:27:06,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2282 events. 1298/2282 cut-off events. For 80116/80116 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14291 event pairs, 574 based on Foata normal form. 18/2297 useless extension candidates. Maximal degree in co-relation 12044. Up to 1265 conditions per place. [2024-06-20 15:27:06,883 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 70 selfloop transitions, 35 changer transitions 7/120 dead transitions. [2024-06-20 15:27:06,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 120 transitions, 1334 flow [2024-06-20 15:27:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:27:06,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:27:06,884 INFO L175 Difference]: Start difference. First operand has 133 places, 95 transitions, 876 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:27:06,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 120 transitions, 1334 flow [2024-06-20 15:27:06,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 120 transitions, 1268 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:06,952 INFO L231 Difference]: Finished difference. Result has 133 places, 94 transitions, 884 flow [2024-06-20 15:27:06,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=884, PETRI_PLACES=133, PETRI_TRANSITIONS=94} [2024-06-20 15:27:06,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-20 15:27:06,953 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 94 transitions, 884 flow [2024-06-20 15:27:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:06,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:06,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:06,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:27:06,953 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 15:27:06,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1625553206, now seen corresponding path program 4 times [2024-06-20 15:27:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:06,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178497277] [2024-06-20 15:27:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,046 INFO 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 15:27:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178497277] [2024-06-20 15:27:07,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178497277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:07,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945286672] [2024-06-20 15:27:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:07,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:07,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:07,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 94 transitions, 884 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:07,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:07,337 INFO L124 PetriNetUnfolderBase]: 1205/2129 cut-off events. [2024-06-20 15:27:07,338 INFO L125 PetriNetUnfolderBase]: For 66690/66698 co-relation queries the response was YES. [2024-06-20 15:27:07,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10993 conditions, 2129 events. 1205/2129 cut-off events. For 66690/66698 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13134 event pairs, 564 based on Foata normal form. 20/2146 useless extension candidates. Maximal degree in co-relation 10934. Up to 1799 conditions per place. [2024-06-20 15:27:07,352 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 76 selfloop transitions, 10 changer transitions 14/108 dead transitions. [2024-06-20 15:27:07,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 108 transitions, 1134 flow [2024-06-20 15:27:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-20 15:27:07,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-20 15:27:07,353 INFO L175 Difference]: Start difference. First operand has 133 places, 94 transitions, 884 flow. Second operand 7 states and 151 transitions. [2024-06-20 15:27:07,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 108 transitions, 1134 flow [2024-06-20 15:27:07,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 108 transitions, 1062 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:07,410 INFO L231 Difference]: Finished difference. Result has 131 places, 90 transitions, 805 flow [2024-06-20 15:27:07,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=90} [2024-06-20 15:27:07,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-20 15:27:07,411 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 90 transitions, 805 flow [2024-06-20 15:27:07,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:07,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:07,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:27:07,411 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 15:27:07,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 343770102, now seen corresponding path program 5 times [2024-06-20 15:27:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:07,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366178119] [2024-06-20 15:27:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,503 INFO 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 15:27:07,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366178119] [2024-06-20 15:27:07,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366178119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:07,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326668391] [2024-06-20 15:27:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:07,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:07,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 90 transitions, 805 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:07,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:07,767 INFO L124 PetriNetUnfolderBase]: 1070/1892 cut-off events. [2024-06-20 15:27:07,767 INFO L125 PetriNetUnfolderBase]: For 57432/57432 co-relation queries the response was YES. [2024-06-20 15:27:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1892 events. 1070/1892 cut-off events. For 57432/57432 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11331 event pairs, 503 based on Foata normal form. 24/1915 useless extension candidates. Maximal degree in co-relation 9352. Up to 1295 conditions per place. [2024-06-20 15:27:07,778 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 65 selfloop transitions, 22 changer transitions 13/108 dead transitions. [2024-06-20 15:27:07,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 108 transitions, 1151 flow [2024-06-20 15:27:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-20 15:27:07,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-20 15:27:07,779 INFO L175 Difference]: Start difference. First operand has 131 places, 90 transitions, 805 flow. Second operand 7 states and 158 transitions. [2024-06-20 15:27:07,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 108 transitions, 1151 flow [2024-06-20 15:27:07,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 108 transitions, 1113 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:07,824 INFO L231 Difference]: Finished difference. Result has 129 places, 84 transitions, 764 flow [2024-06-20 15:27:07,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=129, PETRI_TRANSITIONS=84} [2024-06-20 15:27:07,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-20 15:27:07,825 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 84 transitions, 764 flow [2024-06-20 15:27:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:07,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:07,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:27:07,825 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 15:27:07,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1919782944, now seen corresponding path program 6 times [2024-06-20 15:27:07,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:07,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515064432] [2024-06-20 15:27:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:07,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:07,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515064432] [2024-06-20 15:27:07,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515064432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:07,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704931479] [2024-06-20 15:27:07,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:07,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:07,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:07,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 84 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:07,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:08,087 INFO L124 PetriNetUnfolderBase]: 914/1622 cut-off events. [2024-06-20 15:27:08,088 INFO L125 PetriNetUnfolderBase]: For 45632/45640 co-relation queries the response was YES. [2024-06-20 15:27:08,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7686 conditions, 1622 events. 914/1622 cut-off events. For 45632/45640 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9393 event pairs, 458 based on Foata normal form. 34/1653 useless extension candidates. Maximal degree in co-relation 7628. Up to 1295 conditions per place. [2024-06-20 15:27:08,096 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 19 changer transitions 14/95 dead transitions. [2024-06-20 15:27:08,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 95 transitions, 984 flow [2024-06-20 15:27:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-20 15:27:08,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-20 15:27:08,097 INFO L175 Difference]: Start difference. First operand has 129 places, 84 transitions, 764 flow. Second operand 7 states and 151 transitions. [2024-06-20 15:27:08,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 95 transitions, 984 flow [2024-06-20 15:27:08,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 95 transitions, 937 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:08,150 INFO L231 Difference]: Finished difference. Result has 126 places, 78 transitions, 711 flow [2024-06-20 15:27:08,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=126, PETRI_TRANSITIONS=78} [2024-06-20 15:27:08,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 15:27:08,151 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 78 transitions, 711 flow [2024-06-20 15:27:08,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:27:08,151 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1919629122, now seen corresponding path program 13 times [2024-06-20 15:27:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666679579] [2024-06-20 15:27:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,230 INFO 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 15:27:08,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666679579] [2024-06-20 15:27:08,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666679579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:08,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856481518] [2024-06-20 15:27:08,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:08,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:08,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:08,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 78 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:08,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:08,441 INFO L124 PetriNetUnfolderBase]: 781/1415 cut-off events. [2024-06-20 15:27:08,441 INFO L125 PetriNetUnfolderBase]: For 28629/28629 co-relation queries the response was YES. [2024-06-20 15:27:08,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 1415 events. 781/1415 cut-off events. For 28629/28629 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8059 event pairs, 334 based on Foata normal form. 24/1436 useless extension candidates. Maximal degree in co-relation 6078. Up to 845 conditions per place. [2024-06-20 15:27:08,451 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 10 changer transitions 27/95 dead transitions. [2024-06-20 15:27:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 95 transitions, 967 flow [2024-06-20 15:27:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 15:27:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:27:08,452 INFO L175 Difference]: Start difference. First operand has 126 places, 78 transitions, 711 flow. Second operand 7 states and 154 transitions. [2024-06-20 15:27:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 95 transitions, 967 flow [2024-06-20 15:27:08,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 95 transitions, 925 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:08,481 INFO L231 Difference]: Finished difference. Result has 123 places, 66 transitions, 561 flow [2024-06-20 15:27:08,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=561, PETRI_PLACES=123, PETRI_TRANSITIONS=66} [2024-06-20 15:27:08,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-20 15:27:08,482 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 66 transitions, 561 flow [2024-06-20 15:27:08,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:27:08,482 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2126282562, now seen corresponding path program 14 times [2024-06-20 15:27:08,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113158240] [2024-06-20 15:27:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,566 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 15:27:08,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113158240] [2024-06-20 15:27:08,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113158240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:08,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871754150] [2024-06-20 15:27:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:08,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:08,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:08,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 66 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:08,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:08,752 INFO L124 PetriNetUnfolderBase]: 589/1099 cut-off events. [2024-06-20 15:27:08,752 INFO L125 PetriNetUnfolderBase]: For 23571/23571 co-relation queries the response was YES. [2024-06-20 15:27:08,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4757 conditions, 1099 events. 589/1099 cut-off events. For 23571/23571 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5947 event pairs, 157 based on Foata normal form. 18/1114 useless extension candidates. Maximal degree in co-relation 4712. Up to 368 conditions per place. [2024-06-20 15:27:08,757 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 51 selfloop transitions, 11 changer transitions 14/84 dead transitions. [2024-06-20 15:27:08,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 84 transitions, 833 flow [2024-06-20 15:27:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 15:27:08,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:27:08,758 INFO L175 Difference]: Start difference. First operand has 123 places, 66 transitions, 561 flow. Second operand 7 states and 154 transitions. [2024-06-20 15:27:08,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 84 transitions, 833 flow [2024-06-20 15:27:08,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 84 transitions, 793 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:08,774 INFO L231 Difference]: Finished difference. Result has 112 places, 58 transitions, 467 flow [2024-06-20 15:27:08,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=112, PETRI_TRANSITIONS=58} [2024-06-20 15:27:08,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-20 15:27:08,775 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 58 transitions, 467 flow [2024-06-20 15:27:08,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:08,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:27:08,775 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:08,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2126638752, now seen corresponding path program 15 times [2024-06-20 15:27:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694269930] [2024-06-20 15:27:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:08,866 INFO 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 15:27:08,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:08,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694269930] [2024-06-20 15:27:08,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694269930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:08,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:08,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851133854] [2024-06-20 15:27:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:08,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:08,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:08,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 58 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:08,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:08,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,031 INFO L124 PetriNetUnfolderBase]: 352/684 cut-off events. [2024-06-20 15:27:09,032 INFO L125 PetriNetUnfolderBase]: For 12049/12049 co-relation queries the response was YES. [2024-06-20 15:27:09,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 684 events. 352/684 cut-off events. For 12049/12049 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3348 event pairs, 139 based on Foata normal form. 18/699 useless extension candidates. Maximal degree in co-relation 2752. Up to 368 conditions per place. [2024-06-20 15:27:09,035 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 3 changer transitions 32/73 dead transitions. [2024-06-20 15:27:09,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 73 transitions, 649 flow [2024-06-20 15:27:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-20 15:27:09,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-20 15:27:09,036 INFO L175 Difference]: Start difference. First operand has 112 places, 58 transitions, 467 flow. Second operand 7 states and 150 transitions. [2024-06-20 15:27:09,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 73 transitions, 649 flow [2024-06-20 15:27:09,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 73 transitions, 618 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:09,047 INFO L231 Difference]: Finished difference. Result has 106 places, 40 transitions, 267 flow [2024-06-20 15:27:09,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267, PETRI_PLACES=106, PETRI_TRANSITIONS=40} [2024-06-20 15:27:09,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-20 15:27:09,048 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 40 transitions, 267 flow [2024-06-20 15:27:09,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:27:09,048 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash -69500284, now seen corresponding path program 7 times [2024-06-20 15:27:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134148351] [2024-06-20 15:27:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,139 INFO 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 15:27:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134148351] [2024-06-20 15:27:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134148351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966312783] [2024-06-20 15:27:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:09,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:09,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:09,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 40 transitions, 267 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:09,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,304 INFO L124 PetriNetUnfolderBase]: 361/668 cut-off events. [2024-06-20 15:27:09,304 INFO L125 PetriNetUnfolderBase]: For 13220/13220 co-relation queries the response was YES. [2024-06-20 15:27:09,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 668 events. 361/668 cut-off events. For 13220/13220 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3288 event pairs, 129 based on Foata normal form. 18/680 useless extension candidates. Maximal degree in co-relation 2859. Up to 290 conditions per place. [2024-06-20 15:27:09,308 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 38 selfloop transitions, 5 changer transitions 8/59 dead transitions. [2024-06-20 15:27:09,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 59 transitions, 487 flow [2024-06-20 15:27:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-20 15:27:09,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-20 15:27:09,309 INFO L175 Difference]: Start difference. First operand has 106 places, 40 transitions, 267 flow. Second operand 7 states and 151 transitions. [2024-06-20 15:27:09,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 59 transitions, 487 flow [2024-06-20 15:27:09,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 59 transitions, 426 flow, removed 23 selfloop flow, removed 15 redundant places. [2024-06-20 15:27:09,315 INFO L231 Difference]: Finished difference. Result has 79 places, 38 transitions, 221 flow [2024-06-20 15:27:09,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=79, PETRI_TRANSITIONS=38} [2024-06-20 15:27:09,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-20 15:27:09,316 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 38 transitions, 221 flow [2024-06-20 15:27:09,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:27:09,316 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash -65036284, now seen corresponding path program 8 times [2024-06-20 15:27:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949120366] [2024-06-20 15:27:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,409 INFO 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 15:27:09,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949120366] [2024-06-20 15:27:09,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949120366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:09,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239952619] [2024-06-20 15:27:09,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:09,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:09,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:09,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:09,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 38 transitions, 221 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,551 INFO L124 PetriNetUnfolderBase]: 256/483 cut-off events. [2024-06-20 15:27:09,551 INFO L125 PetriNetUnfolderBase]: For 4099/4099 co-relation queries the response was YES. [2024-06-20 15:27:09,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 483 events. 256/483 cut-off events. For 4099/4099 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2148 event pairs, 111 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1767. Up to 290 conditions per place. [2024-06-20 15:27:09,553 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 25 selfloop transitions, 2 changer transitions 17/52 dead transitions. [2024-06-20 15:27:09,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 52 transitions, 359 flow [2024-06-20 15:27:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 15:27:09,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-20 15:27:09,554 INFO L175 Difference]: Start difference. First operand has 79 places, 38 transitions, 221 flow. Second operand 7 states and 145 transitions. [2024-06-20 15:27:09,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 52 transitions, 359 flow [2024-06-20 15:27:09,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 52 transitions, 346 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:09,557 INFO L231 Difference]: Finished difference. Result has 78 places, 34 transitions, 182 flow [2024-06-20 15:27:09,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=182, PETRI_PLACES=78, PETRI_TRANSITIONS=34} [2024-06-20 15:27:09,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-20 15:27:09,557 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 34 transitions, 182 flow [2024-06-20 15:27:09,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:27:09,558 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1797295212, now seen corresponding path program 9 times [2024-06-20 15:27:09,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897327489] [2024-06-20 15:27:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,642 INFO 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 15:27:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897327489] [2024-06-20 15:27:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897327489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:09,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179326881] [2024-06-20 15:27:09,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:09,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:09,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:09,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 34 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:09,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,777 INFO L124 PetriNetUnfolderBase]: 310/591 cut-off events. [2024-06-20 15:27:09,777 INFO L125 PetriNetUnfolderBase]: For 4963/4963 co-relation queries the response was YES. [2024-06-20 15:27:09,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 591 events. 310/591 cut-off events. For 4963/4963 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2833 event pairs, 32 based on Foata normal form. 18/607 useless extension candidates. Maximal degree in co-relation 2221. Up to 211 conditions per place. [2024-06-20 15:27:09,779 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 31 selfloop transitions, 5 changer transitions 8/52 dead transitions. [2024-06-20 15:27:09,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 52 transitions, 372 flow [2024-06-20 15:27:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-20 15:27:09,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 15:27:09,785 INFO L175 Difference]: Start difference. First operand has 78 places, 34 transitions, 182 flow. Second operand 7 states and 147 transitions. [2024-06-20 15:27:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 52 transitions, 372 flow [2024-06-20 15:27:09,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 52 transitions, 354 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:09,787 INFO L231 Difference]: Finished difference. Result has 71 places, 32 transitions, 167 flow [2024-06-20 15:27:09,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=71, PETRI_TRANSITIONS=32} [2024-06-20 15:27:09,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-20 15:27:09,788 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 32 transitions, 167 flow [2024-06-20 15:27:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:27:09,788 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash -887696970, now seen corresponding path program 10 times [2024-06-20 15:27:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389501754] [2024-06-20 15:27:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,874 INFO 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 15:27:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389501754] [2024-06-20 15:27:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389501754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868474982] [2024-06-20 15:27:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:09,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:09,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 32 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:09,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,985 INFO L124 PetriNetUnfolderBase]: 205/398 cut-off events. [2024-06-20 15:27:09,985 INFO L125 PetriNetUnfolderBase]: For 2725/2725 co-relation queries the response was YES. [2024-06-20 15:27:09,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 398 events. 205/398 cut-off events. For 2725/2725 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1663 event pairs, 58 based on Foata normal form. 18/416 useless extension candidates. Maximal degree in co-relation 1431. Up to 204 conditions per place. [2024-06-20 15:27:09,987 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 21 selfloop transitions, 3 changer transitions 15/47 dead transitions. [2024-06-20 15:27:09,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 47 transitions, 297 flow [2024-06-20 15:27:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 15:27:09,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-20 15:27:09,988 INFO L175 Difference]: Start difference. First operand has 71 places, 32 transitions, 167 flow. Second operand 7 states and 145 transitions. [2024-06-20 15:27:09,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 47 transitions, 297 flow [2024-06-20 15:27:09,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 47 transitions, 280 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:09,989 INFO L231 Difference]: Finished difference. Result has 69 places, 29 transitions, 138 flow [2024-06-20 15:27:09,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=138, PETRI_PLACES=69, PETRI_TRANSITIONS=29} [2024-06-20 15:27:09,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-20 15:27:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 29 transitions, 138 flow [2024-06-20 15:27:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:09,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:09,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:27:09,990 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:09,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash 313994132, now seen corresponding path program 11 times [2024-06-20 15:27:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048054335] [2024-06-20 15:27:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:10,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048054335] [2024-06-20 15:27:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048054335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:10,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:10,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299383872] [2024-06-20 15:27:10,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:10,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:10,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:10,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:27:10,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 29 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:10,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:27:10,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:10,171 INFO L124 PetriNetUnfolderBase]: 96/207 cut-off events. [2024-06-20 15:27:10,172 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-20 15:27:10,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 207 events. 96/207 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 666 event pairs, 2 based on Foata normal form. 18/225 useless extension candidates. Maximal degree in co-relation 637. Up to 96 conditions per place. [2024-06-20 15:27:10,172 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-20 15:27:10,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 39 transitions, 222 flow [2024-06-20 15:27:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:27:10,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-20 15:27:10,173 INFO L175 Difference]: Start difference. First operand has 69 places, 29 transitions, 138 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:27:10,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 39 transitions, 222 flow [2024-06-20 15:27:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 39 transitions, 180 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-20 15:27:10,174 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2024-06-20 15:27:10,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2024-06-20 15:27:10,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-20 15:27:10,174 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2024-06-20 15:27:10,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:10,177 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-20 15:27:10,178 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-20 15:27:10,178 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-20 15:27:10,178 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-20 15:27:10,178 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-20 15:27:10,178 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-20 15:27:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:27:10,178 INFO L445 BasicCegarLoop]: Path program histogram: [15, 15, 14, 12, 11, 9, 9, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:10,183 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 15:27:10,183 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 15:27:10,189 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-20 15:27:10,189 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-20 15:27:10,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 03:27:10 BasicIcfg [2024-06-20 15:27:10,191 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 15:27:10,191 INFO L158 Benchmark]: Toolchain (without parser) took 135027.23ms. Allocated memory was 167.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 88.9MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 745.5MB. Max. memory is 16.1GB. [2024-06-20 15:27:10,191 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 120.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:27:10,191 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 167.8MB. Free memory is still 136.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:27:10,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 528.99ms. Allocated memory is still 167.8MB. Free memory was 88.7MB in the beginning and 134.8MB in the end (delta: -46.1MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2024-06-20 15:27:10,192 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.28ms. Allocated memory is still 167.8MB. Free memory was 134.8MB in the beginning and 132.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 15:27:10,192 INFO L158 Benchmark]: Boogie Preprocessor took 28.76ms. Allocated memory is still 167.8MB. Free memory was 132.7MB in the beginning and 130.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 15:27:10,192 INFO L158 Benchmark]: RCFGBuilder took 432.36ms. Allocated memory is still 167.8MB. Free memory was 130.6MB in the beginning and 104.3MB in the end (delta: 26.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-20 15:27:10,192 INFO L158 Benchmark]: TraceAbstraction took 133971.69ms. Allocated memory was 167.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 103.4MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 758.8MB. Max. memory is 16.1GB. [2024-06-20 15:27:10,193 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 167.8MB. Free memory is still 120.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 167.8MB. Free memory is still 136.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 528.99ms. Allocated memory is still 167.8MB. Free memory was 88.7MB in the beginning and 134.8MB in the end (delta: -46.1MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.28ms. Allocated memory is still 167.8MB. Free memory was 134.8MB in the beginning and 132.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.76ms. Allocated memory is still 167.8MB. Free memory was 132.7MB in the beginning and 130.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 432.36ms. Allocated memory is still 167.8MB. Free memory was 130.6MB in the beginning and 104.3MB in the end (delta: 26.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 133971.69ms. Allocated memory was 167.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 103.4MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 758.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 781]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 65 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 133.9s, OverallIterations: 142, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 120.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9024 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7036 mSDsluCounter, 2548 SdHoareTripleChecker+Invalid, 11.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1807 mSDsCounter, 1454 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32225 IncrementalHoareTripleChecker+Invalid, 33679 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1454 mSolverCounterUnsat, 741 mSDtfsCounter, 32225 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 808 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 808 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3130occurred in iteration=98, InterpolantAutomatonStates: 988, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 2706 NumberOfCodeBlocks, 2706 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2564 ConstructedInterpolants, 0 QuantifiedInterpolants, 22316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 142 InterpolantComputations, 142 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 15:27:10,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE