./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:22:48,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:22:48,875 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:22:48,877 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:22:48,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:22:48,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:22:48,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:22:48,907 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:22:48,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:22:48,908 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:22:48,908 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:22:48,908 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:22:48,909 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:22:48,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:22:48,911 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:22:48,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:22:48,912 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:22:48,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:22:48,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:22:48,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:22:48,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:22:48,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:22:48,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:22:48,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:22:48,915 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:22:48,916 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:22:48,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:22:48,916 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:22:48,916 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:22:48,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:22:48,917 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:22:48,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:22:48,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:22:48,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:22:48,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:22:48,918 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:22:48,918 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:22:48,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:22:48,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:22:48,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:22:48,919 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:22:48,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:22:48,919 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:22:48,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:22:49,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:22:49,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:22:49,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:22:49,160 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:22:49,161 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:22:49,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 02:22:49,235 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:22:49,236 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:22:49,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:22:50,213 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:22:50,433 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:22:50,434 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:22:50,448 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3a0894b/6fcd071b0ce6447db19565187798c52f/FLAG4c941ea89 [2024-06-28 02:22:50,463 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3a0894b/6fcd071b0ce6447db19565187798c52f [2024-06-28 02:22:50,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:22:50,465 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:22:50,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:22:50,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:22:50,470 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:22:50,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:22:49" (1/2) ... [2024-06-28 02:22:50,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49015c77 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:22:50, skipping insertion in model container [2024-06-28 02:22:50,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:22:49" (1/2) ... [2024-06-28 02:22:50,473 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@233221a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:22:50, skipping insertion in model container [2024-06-28 02:22:50,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:22:50" (2/2) ... [2024-06-28 02:22:50,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49015c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50, skipping insertion in model container [2024-06-28 02:22:50,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:22:50" (2/2) ... [2024-06-28 02:22:50,474 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:22:50,506 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:22:50,507 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 02:22:50,507 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 02:22:50,507 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 02:22:50,508 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:22:50,508 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-28 02:22:50,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:22:50,788 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:22:50,797 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:22:50,860 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:22:50,887 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:22:50,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50 WrapperNode [2024-06-28 02:22:50,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:22:50,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:22:50,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:22:50,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:22:50,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:50,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:50,955 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-28 02:22:50,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:22:50,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:22:50,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:22:50,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:22:50,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:50,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:50,968 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,014 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]. [2024-06-28 02:22:51,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,031 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,064 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:22:51,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:22:51,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:22:51,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:22:51,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (1/1) ... [2024-06-28 02:22:51,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:22:51,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:22:51,093 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) [2024-06-28 02:22:51,110 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 [2024-06-28 02:22:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:22:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:22:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:22:51,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:22:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:22:51,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:22:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:22:51,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:22:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:22:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:22:51,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:22:51,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:22:51,125 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:22:51,218 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:22:51,219 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:22:51,376 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:22:51,376 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:22:51,443 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:22:51,444 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:22:51,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:22:51 BoogieIcfgContainer [2024-06-28 02:22:51,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:22:51,445 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:22:51,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:22:51,448 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:22:51,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:22:49" (1/4) ... [2024-06-28 02:22:51,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc43ae8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:22:51, skipping insertion in model container [2024-06-28 02:22:51,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:22:50" (2/4) ... [2024-06-28 02:22:51,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc43ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:22:51, skipping insertion in model container [2024-06-28 02:22:51,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:50" (3/4) ... [2024-06-28 02:22:51,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc43ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:22:51, skipping insertion in model container [2024-06-28 02:22:51,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:22:51" (4/4) ... [2024-06-28 02:22:51,449 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:22:51,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:22:51,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 02:22:51,469 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:22:51,510 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:22:51,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-28 02:22:51,553 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-28 02:22:51,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:22:51,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:22:51,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-28 02:22:51,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-28 02:22:51,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:22:51,575 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;@17df97c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:22:51,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 02:22:51,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:22:51,582 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:22:51,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:22:51,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:51,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:22:51,583 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)] === [2024-06-28 02:22:51,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 215575840, now seen corresponding path program 1 times [2024-06-28 02:22:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:51,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204261507] [2024-06-28 02:22:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:51,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:51,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204261507] [2024-06-28 02:22:51,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204261507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:51,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:51,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:22:51,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750305424] [2024-06-28 02:22:51,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:22:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:51,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:22:51,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:22:51,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-06-28 02:22:51,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:51,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:51,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-06-28 02:22:51,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:52,178 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-28 02:22:52,178 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 02:22:52,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3895 event pairs, 288 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-28 02:22:52,189 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-28 02:22:52,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 157 flow [2024-06-28 02:22:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:22:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:22:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-28 02:22:52,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-28 02:22:52,201 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 82 transitions. [2024-06-28 02:22:52,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 157 flow [2024-06-28 02:22:52,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:52,206 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-28 02:22:52,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-28 02:22:52,212 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-28 02:22:52,212 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-28 02:22:52,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:52,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:52,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:22:52,213 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)] === [2024-06-28 02:22:52,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1277271903, now seen corresponding path program 1 times [2024-06-28 02:22:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:52,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154191393] [2024-06-28 02:22:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:52,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:52,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154191393] [2024-06-28 02:22:52,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154191393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:52,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:52,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053045964] [2024-06-28 02:22:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:52,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:52,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:52,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:52,552 INFO L124 PetriNetUnfolderBase]: 754/1254 cut-off events. [2024-06-28 02:22:52,552 INFO L125 PetriNetUnfolderBase]: For 194/196 co-relation queries the response was YES. [2024-06-28 02:22:52,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 1254 events. 754/1254 cut-off events. For 194/196 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6109 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-28 02:22:52,558 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-28 02:22:52,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 248 flow [2024-06-28 02:22:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-28 02:22:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-28 02:22:52,563 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 103 transitions. [2024-06-28 02:22:52,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 248 flow [2024-06-28 02:22:52,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:52,565 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 148 flow [2024-06-28 02:22:52,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-28 02:22:52,567 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-28 02:22:52,567 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 148 flow [2024-06-28 02:22:52,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:52,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:22:52,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:52,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -902335586, now seen corresponding path program 1 times [2024-06-28 02:22:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:52,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597356814] [2024-06-28 02:22:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:52,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:52,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597356814] [2024-06-28 02:22:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597356814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:52,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:52,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397525190] [2024-06-28 02:22:52,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:52,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:52,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:52,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:52,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:52,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:52,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:52,924 INFO L124 PetriNetUnfolderBase]: 745/1239 cut-off events. [2024-06-28 02:22:52,925 INFO L125 PetriNetUnfolderBase]: For 580/588 co-relation queries the response was YES. [2024-06-28 02:22:52,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 1239 events. 745/1239 cut-off events. For 580/588 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6017 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-28 02:22:52,931 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 44 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-28 02:22:52,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 308 flow [2024-06-28 02:22:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:22:52,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-28 02:22:52,935 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 148 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:22:52,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 308 flow [2024-06-28 02:22:52,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 306 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:52,938 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 179 flow [2024-06-28 02:22:52,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-28 02:22:52,940 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-06-28 02:22:52,940 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 179 flow [2024-06-28 02:22:52,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:52,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:52,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:22:52,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:52,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1632488695, now seen corresponding path program 1 times [2024-06-28 02:22:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:52,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813331383] [2024-06-28 02:22:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:53,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:53,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813331383] [2024-06-28 02:22:53,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813331383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:53,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:53,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128257164] [2024-06-28 02:22:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:53,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:53,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:53,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:53,183 INFO L124 PetriNetUnfolderBase]: 747/1228 cut-off events. [2024-06-28 02:22:53,184 INFO L125 PetriNetUnfolderBase]: For 1101/1103 co-relation queries the response was YES. [2024-06-28 02:22:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1228 events. 747/1228 cut-off events. For 1101/1103 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5857 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-28 02:22:53,191 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-28 02:22:53,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 387 flow [2024-06-28 02:22:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-28 02:22:53,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-28 02:22:53,193 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 179 flow. Second operand 4 states and 102 transitions. [2024-06-28 02:22:53,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 387 flow [2024-06-28 02:22:53,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 362 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:53,198 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-28 02:22:53,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-28 02:22:53,200 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-06-28 02:22:53,200 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-28 02:22:53,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:53,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:53,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:22:53,201 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)] === [2024-06-28 02:22:53,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2101841614, now seen corresponding path program 1 times [2024-06-28 02:22:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:53,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201918957] [2024-06-28 02:22:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:53,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:53,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201918957] [2024-06-28 02:22:53,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201918957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:53,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:53,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601020973] [2024-06-28 02:22:53,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:53,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:53,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:53,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:53,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:53,461 INFO L124 PetriNetUnfolderBase]: 758/1285 cut-off events. [2024-06-28 02:22:53,461 INFO L125 PetriNetUnfolderBase]: For 1862/1874 co-relation queries the response was YES. [2024-06-28 02:22:53,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1285 events. 758/1285 cut-off events. For 1862/1874 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6408 event pairs, 280 based on Foata normal form. 14/1298 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-28 02:22:53,468 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-28 02:22:53,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 484 flow [2024-06-28 02:22:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-28 02:22:53,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-28 02:22:53,470 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 5 states and 126 transitions. [2024-06-28 02:22:53,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 484 flow [2024-06-28 02:22:53,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 478 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:53,473 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 315 flow [2024-06-28 02:22:53,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-28 02:22:53,474 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-06-28 02:22:53,474 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 315 flow [2024-06-28 02:22:53,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:53,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:53,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:22:53,475 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)] === [2024-06-28 02:22:53,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1897587144, now seen corresponding path program 1 times [2024-06-28 02:22:53,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:53,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188461549] [2024-06-28 02:22:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:53,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:53,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:53,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188461549] [2024-06-28 02:22:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188461549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:53,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:53,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:53,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288873196] [2024-06-28 02:22:53,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:53,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:53,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:53,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:53,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:53,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:53,764 INFO L124 PetriNetUnfolderBase]: 800/1331 cut-off events. [2024-06-28 02:22:53,764 INFO L125 PetriNetUnfolderBase]: For 2808/2820 co-relation queries the response was YES. [2024-06-28 02:22:53,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1331 events. 800/1331 cut-off events. For 2808/2820 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6563 event pairs, 253 based on Foata normal form. 15/1345 useless extension candidates. Maximal degree in co-relation 4535. Up to 1123 conditions per place. [2024-06-28 02:22:53,771 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 48 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2024-06-28 02:22:53,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 554 flow [2024-06-28 02:22:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:22:53,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-28 02:22:53,772 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 315 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:22:53,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 554 flow [2024-06-28 02:22:53,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 531 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:53,778 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 427 flow [2024-06-28 02:22:53,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-28 02:22:53,780 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-28 02:22:53,781 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 427 flow [2024-06-28 02:22:53,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:22:53,781 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)] === [2024-06-28 02:22:53,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1897586958, now seen corresponding path program 2 times [2024-06-28 02:22:53,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:53,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927201083] [2024-06-28 02:22:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:53,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927201083] [2024-06-28 02:22:53,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927201083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:53,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895514133] [2024-06-28 02:22:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:53,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:53,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:53,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:53,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:53,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:53,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:54,061 INFO L124 PetriNetUnfolderBase]: 795/1342 cut-off events. [2024-06-28 02:22:54,062 INFO L125 PetriNetUnfolderBase]: For 4227/4241 co-relation queries the response was YES. [2024-06-28 02:22:54,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 1342 events. 795/1342 cut-off events. For 4227/4241 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6707 event pairs, 271 based on Foata normal form. 16/1357 useless extension candidates. Maximal degree in co-relation 5126. Up to 1148 conditions per place. [2024-06-28 02:22:54,070 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 58 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-28 02:22:54,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 605 flow [2024-06-28 02:22:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-28 02:22:54,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-28 02:22:54,072 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 427 flow. Second operand 4 states and 103 transitions. [2024-06-28 02:22:54,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 605 flow [2024-06-28 02:22:54,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 578 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:54,079 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 438 flow [2024-06-28 02:22:54,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-28 02:22:54,081 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-28 02:22:54,081 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 438 flow [2024-06-28 02:22:54,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:54,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:54,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:22:54,082 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)] === [2024-06-28 02:22:54,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash -687550554, now seen corresponding path program 2 times [2024-06-28 02:22:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:54,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847983326] [2024-06-28 02:22:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:54,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847983326] [2024-06-28 02:22:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847983326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:54,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:54,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563040107] [2024-06-28 02:22:54,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:54,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:54,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:54,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:54,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:54,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:54,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:54,329 INFO L124 PetriNetUnfolderBase]: 805/1335 cut-off events. [2024-06-28 02:22:54,329 INFO L125 PetriNetUnfolderBase]: For 4916/4930 co-relation queries the response was YES. [2024-06-28 02:22:54,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1335 events. 805/1335 cut-off events. For 4916/4930 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6573 event pairs, 267 based on Foata normal form. 17/1345 useless extension candidates. Maximal degree in co-relation 5313. Up to 1092 conditions per place. [2024-06-28 02:22:54,338 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 55 selfloop transitions, 31 changer transitions 0/93 dead transitions. [2024-06-28 02:22:54,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 764 flow [2024-06-28 02:22:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-28 02:22:54,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2024-06-28 02:22:54,340 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 438 flow. Second operand 5 states and 127 transitions. [2024-06-28 02:22:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 764 flow [2024-06-28 02:22:54,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 726 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:54,351 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 582 flow [2024-06-28 02:22:54,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-28 02:22:54,353 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2024-06-28 02:22:54,354 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 582 flow [2024-06-28 02:22:54,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:54,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:54,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:22:54,354 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)] === [2024-06-28 02:22:54,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:54,355 INFO L85 PathProgramCache]: Analyzing trace with hash -687541626, now seen corresponding path program 1 times [2024-06-28 02:22:54,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:54,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451827358] [2024-06-28 02:22:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:54,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:54,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:54,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451827358] [2024-06-28 02:22:54,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451827358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:54,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:54,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:54,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745854687] [2024-06-28 02:22:54,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:54,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:54,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:54,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:54,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:54,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:54,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:54,622 INFO L124 PetriNetUnfolderBase]: 835/1398 cut-off events. [2024-06-28 02:22:54,623 INFO L125 PetriNetUnfolderBase]: For 5763/5769 co-relation queries the response was YES. [2024-06-28 02:22:54,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5897 conditions, 1398 events. 835/1398 cut-off events. For 5763/5769 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6980 event pairs, 242 based on Foata normal form. 18/1412 useless extension candidates. Maximal degree in co-relation 5867. Up to 1175 conditions per place. [2024-06-28 02:22:54,632 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 81 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-28 02:22:54,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 892 flow [2024-06-28 02:22:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-28 02:22:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-28 02:22:54,636 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 582 flow. Second operand 5 states and 126 transitions. [2024-06-28 02:22:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 892 flow [2024-06-28 02:22:54,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 856 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:54,650 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 606 flow [2024-06-28 02:22:54,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=606, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-28 02:22:54,651 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-28 02:22:54,651 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 606 flow [2024-06-28 02:22:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:54,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:22:54,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1548956050, now seen corresponding path program 1 times [2024-06-28 02:22:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:54,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785305466] [2024-06-28 02:22:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:54,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:54,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785305466] [2024-06-28 02:22:54,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785305466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:54,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:22:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463547157] [2024-06-28 02:22:54,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:54,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:22:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:22:54,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:22:54,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:22:54,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 606 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:54,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:22:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:54,855 INFO L124 PetriNetUnfolderBase]: 760/1286 cut-off events. [2024-06-28 02:22:54,855 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-28 02:22:54,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 1286 events. 760/1286 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6460 event pairs, 246 based on Foata normal form. 6/1273 useless extension candidates. Maximal degree in co-relation 5373. Up to 1115 conditions per place. [2024-06-28 02:22:54,868 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 64 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-06-28 02:22:54,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 797 flow [2024-06-28 02:22:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-28 02:22:54,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-28 02:22:54,869 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 606 flow. Second operand 4 states and 99 transitions. [2024-06-28 02:22:54,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 797 flow [2024-06-28 02:22:54,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 763 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:54,875 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 637 flow [2024-06-28 02:22:54,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=637, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-06-28 02:22:54,876 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-28 02:22:54,876 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 637 flow [2024-06-28 02:22:54,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:54,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:54,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:22:54,877 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)] === [2024-06-28 02:22:54,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1616664564, now seen corresponding path program 1 times [2024-06-28 02:22:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272854246] [2024-06-28 02:22:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:54,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:54,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272854246] [2024-06-28 02:22:54,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272854246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:54,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:54,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729784756] [2024-06-28 02:22:54,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:54,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:54,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:54,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:54,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 637 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:54,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:54,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:55,195 INFO L124 PetriNetUnfolderBase]: 886/1493 cut-off events. [2024-06-28 02:22:55,195 INFO L125 PetriNetUnfolderBase]: For 6889/6903 co-relation queries the response was YES. [2024-06-28 02:22:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6279 conditions, 1493 events. 886/1493 cut-off events. For 6889/6903 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7658 event pairs, 249 based on Foata normal form. 17/1509 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-28 02:22:55,204 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 42 changer transitions 0/129 dead transitions. [2024-06-28 02:22:55,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 1151 flow [2024-06-28 02:22:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:22:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:22:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-28 02:22:55,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210826210826211 [2024-06-28 02:22:55,207 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 637 flow. Second operand 9 states and 218 transitions. [2024-06-28 02:22:55,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 1151 flow [2024-06-28 02:22:55,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1139 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:55,214 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 831 flow [2024-06-28 02:22:55,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=831, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-28 02:22:55,215 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-28 02:22:55,215 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 831 flow [2024-06-28 02:22:55,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:55,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:55,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:22:55,216 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)] === [2024-06-28 02:22:55,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1304345368, now seen corresponding path program 2 times [2024-06-28 02:22:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:55,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337545544] [2024-06-28 02:22:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337545544] [2024-06-28 02:22:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337545544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:55,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:55,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:55,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322721797] [2024-06-28 02:22:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:55,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:55,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:55,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:55,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 831 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:55,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:55,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:55,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:55,533 INFO L124 PetriNetUnfolderBase]: 904/1526 cut-off events. [2024-06-28 02:22:55,534 INFO L125 PetriNetUnfolderBase]: For 9411/9425 co-relation queries the response was YES. [2024-06-28 02:22:55,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7117 conditions, 1526 events. 904/1526 cut-off events. For 9411/9425 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7874 event pairs, 250 based on Foata normal form. 17/1542 useless extension candidates. Maximal degree in co-relation 7078. Up to 1204 conditions per place. [2024-06-28 02:22:55,577 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 82 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2024-06-28 02:22:55,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1264 flow [2024-06-28 02:22:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 02:22:55,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-28 02:22:55,579 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 831 flow. Second operand 6 states and 155 transitions. [2024-06-28 02:22:55,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1264 flow [2024-06-28 02:22:55,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1167 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:55,592 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 885 flow [2024-06-28 02:22:55,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=885, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-28 02:22:55,593 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-28 02:22:55,593 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 885 flow [2024-06-28 02:22:55,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:55,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:55,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:55,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:22:55,595 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)] === [2024-06-28 02:22:55,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1304339788, now seen corresponding path program 3 times [2024-06-28 02:22:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:55,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531377695] [2024-06-28 02:22:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:55,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:55,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531377695] [2024-06-28 02:22:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531377695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:55,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:55,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:55,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977495191] [2024-06-28 02:22:55,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:55,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:55,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:55,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:55,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:55,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 885 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:55,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:55,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:55,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:55,924 INFO L124 PetriNetUnfolderBase]: 906/1532 cut-off events. [2024-06-28 02:22:55,924 INFO L125 PetriNetUnfolderBase]: For 10805/10819 co-relation queries the response was YES. [2024-06-28 02:22:55,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7415 conditions, 1532 events. 906/1532 cut-off events. For 10805/10819 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7930 event pairs, 250 based on Foata normal form. 17/1548 useless extension candidates. Maximal degree in co-relation 7373. Up to 1209 conditions per place. [2024-06-28 02:22:55,936 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 81 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-28 02:22:55,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1303 flow [2024-06-28 02:22:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:22:55,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:22:55,939 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 885 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:22:55,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1303 flow [2024-06-28 02:22:55,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1228 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:55,956 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 953 flow [2024-06-28 02:22:55,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=953, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-28 02:22:55,957 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-28 02:22:55,957 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 953 flow [2024-06-28 02:22:55,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:55,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:55,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:55,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:22:55,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:55,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash 160770198, now seen corresponding path program 4 times [2024-06-28 02:22:55,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:55,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983807541] [2024-06-28 02:22:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:55,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:56,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983807541] [2024-06-28 02:22:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983807541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:56,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:56,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162909659] [2024-06-28 02:22:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:56,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:56,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 953 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:56,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:56,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:56,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:56,277 INFO L124 PetriNetUnfolderBase]: 930/1568 cut-off events. [2024-06-28 02:22:56,278 INFO L125 PetriNetUnfolderBase]: For 12693/12707 co-relation queries the response was YES. [2024-06-28 02:22:56,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7761 conditions, 1568 events. 930/1568 cut-off events. For 12693/12707 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8126 event pairs, 255 based on Foata normal form. 17/1578 useless extension candidates. Maximal degree in co-relation 7718. Up to 1171 conditions per place. [2024-06-28 02:22:56,290 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 60 changer transitions 0/147 dead transitions. [2024-06-28 02:22:56,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1535 flow [2024-06-28 02:22:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:22:56,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-28 02:22:56,291 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 953 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:22:56,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1535 flow [2024-06-28 02:22:56,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 147 transitions, 1431 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 02:22:56,308 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 1125 flow [2024-06-28 02:22:56,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-06-28 02:22:56,308 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-28 02:22:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 1125 flow [2024-06-28 02:22:56,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:56,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:22:56,309 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:56,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1068728269, now seen corresponding path program 1 times [2024-06-28 02:22:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487551978] [2024-06-28 02:22:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:56,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487551978] [2024-06-28 02:22:56,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487551978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:56,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:56,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786067946] [2024-06-28 02:22:56,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:56,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:56,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:56,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:56,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:56,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:56,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:56,616 INFO L124 PetriNetUnfolderBase]: 947/1597 cut-off events. [2024-06-28 02:22:56,617 INFO L125 PetriNetUnfolderBase]: For 15676/15690 co-relation queries the response was YES. [2024-06-28 02:22:56,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8493 conditions, 1597 events. 947/1597 cut-off events. For 15676/15690 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8285 event pairs, 164 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 8448. Up to 1278 conditions per place. [2024-06-28 02:22:56,628 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 112 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-28 02:22:56,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1585 flow [2024-06-28 02:22:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:22:56,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-28 02:22:56,630 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 1125 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:22:56,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1585 flow [2024-06-28 02:22:56,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 1485 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:56,651 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1158 flow [2024-06-28 02:22:56,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1158, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-28 02:22:56,651 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2024-06-28 02:22:56,651 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1158 flow [2024-06-28 02:22:56,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:56,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:56,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:56,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:22:56,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:56,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1068788719, now seen corresponding path program 2 times [2024-06-28 02:22:56,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:56,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91284723] [2024-06-28 02:22:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:56,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:56,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91284723] [2024-06-28 02:22:56,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91284723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:56,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:56,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:56,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030426468] [2024-06-28 02:22:56,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:56,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:56,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:56,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:56,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:56,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:56,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:56,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:56,969 INFO L124 PetriNetUnfolderBase]: 964/1624 cut-off events. [2024-06-28 02:22:56,969 INFO L125 PetriNetUnfolderBase]: For 17583/17597 co-relation queries the response was YES. [2024-06-28 02:22:56,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1624 events. 964/1624 cut-off events. For 17583/17597 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8458 event pairs, 235 based on Foata normal form. 18/1641 useless extension candidates. Maximal degree in co-relation 8784. Up to 1369 conditions per place. [2024-06-28 02:22:56,980 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-28 02:22:56,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 1526 flow [2024-06-28 02:22:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:22:56,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-06-28 02:22:56,982 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1158 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:22:56,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 1526 flow [2024-06-28 02:22:57,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1449 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-28 02:22:57,005 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 1174 flow [2024-06-28 02:22:57,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-28 02:22:57,005 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-06-28 02:22:57,005 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 1174 flow [2024-06-28 02:22:57,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:57,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:22:57,006 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)] === [2024-06-28 02:22:57,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1780004595, now seen corresponding path program 3 times [2024-06-28 02:22:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685127950] [2024-06-28 02:22:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685127950] [2024-06-28 02:22:57,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685127950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:57,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:57,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:57,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100041697] [2024-06-28 02:22:57,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:57,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:57,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:57,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:57,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:57,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 1174 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:57,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:57,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:57,361 INFO L124 PetriNetUnfolderBase]: 956/1612 cut-off events. [2024-06-28 02:22:57,361 INFO L125 PetriNetUnfolderBase]: For 18285/18299 co-relation queries the response was YES. [2024-06-28 02:22:57,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 1612 events. 956/1612 cut-off events. For 18285/18299 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8363 event pairs, 162 based on Foata normal form. 18/1629 useless extension candidates. Maximal degree in co-relation 8645. Up to 1336 conditions per place. [2024-06-28 02:22:57,373 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-06-28 02:22:57,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1482 flow [2024-06-28 02:22:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-28 02:22:57,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-28 02:22:57,375 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 1174 flow. Second operand 5 states and 125 transitions. [2024-06-28 02:22:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1482 flow [2024-06-28 02:22:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 137 transitions, 1403 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:57,400 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 1143 flow [2024-06-28 02:22:57,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1143, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2024-06-28 02:22:57,401 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-28 02:22:57,401 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 1143 flow [2024-06-28 02:22:57,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:57,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:57,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:22:57,402 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)] === [2024-06-28 02:22:57,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1779819897, now seen corresponding path program 1 times [2024-06-28 02:22:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974676928] [2024-06-28 02:22:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974676928] [2024-06-28 02:22:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974676928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646246565] [2024-06-28 02:22:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:57,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:57,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:57,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:57,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 1143 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:57,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:57,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:57,729 INFO L124 PetriNetUnfolderBase]: 1011/1699 cut-off events. [2024-06-28 02:22:57,730 INFO L125 PetriNetUnfolderBase]: For 20922/20936 co-relation queries the response was YES. [2024-06-28 02:22:57,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 1699 events. 1011/1699 cut-off events. For 20922/20936 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8899 event pairs, 213 based on Foata normal form. 26/1724 useless extension candidates. Maximal degree in co-relation 9032. Up to 1334 conditions per place. [2024-06-28 02:22:57,741 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-28 02:22:57,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1553 flow [2024-06-28 02:22:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:22:57,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-28 02:22:57,743 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 1143 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:22:57,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1553 flow [2024-06-28 02:22:57,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 1508 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:57,765 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1204 flow [2024-06-28 02:22:57,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1204, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-06-28 02:22:57,766 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 64 predicate places. [2024-06-28 02:22:57,766 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1204 flow [2024-06-28 02:22:57,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:57,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:57,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:22:57,767 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:57,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash 455456689, now seen corresponding path program 1 times [2024-06-28 02:22:57,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:57,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347705071] [2024-06-28 02:22:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:57,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:57,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:57,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347705071] [2024-06-28 02:22:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347705071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:57,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:57,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162861923] [2024-06-28 02:22:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:57,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:22:57,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1204 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) [2024-06-28 02:22:57,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:57,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:22:57,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:58,030 INFO L124 PetriNetUnfolderBase]: 937/1588 cut-off events. [2024-06-28 02:22:58,030 INFO L125 PetriNetUnfolderBase]: For 21123/21130 co-relation queries the response was YES. [2024-06-28 02:22:58,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8815 conditions, 1588 events. 937/1588 cut-off events. For 21123/21130 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8345 event pairs, 214 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 8764. Up to 1337 conditions per place. [2024-06-28 02:22:58,042 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 94 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-28 02:22:58,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 132 transitions, 1472 flow [2024-06-28 02:22:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:22:58,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-28 02:22:58,044 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1204 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:22:58,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 132 transitions, 1472 flow [2024-06-28 02:22:58,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 1394 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:58,071 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1192 flow [2024-06-28 02:22:58,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1192, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-28 02:22:58,072 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-28 02:22:58,072 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1192 flow [2024-06-28 02:22:58,072 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) [2024-06-28 02:22:58,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:58,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:58,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:22:58,072 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)] === [2024-06-28 02:22:58,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:58,073 INFO L85 PathProgramCache]: Analyzing trace with hash 688916709, now seen corresponding path program 2 times [2024-06-28 02:22:58,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:58,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924198175] [2024-06-28 02:22:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:58,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:58,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:58,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924198175] [2024-06-28 02:22:58,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924198175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:58,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:58,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:58,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016754737] [2024-06-28 02:22:58,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:58,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:58,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1192 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:58,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:58,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:58,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:58,395 INFO L124 PetriNetUnfolderBase]: 1033/1728 cut-off events. [2024-06-28 02:22:58,395 INFO L125 PetriNetUnfolderBase]: For 24450/24464 co-relation queries the response was YES. [2024-06-28 02:22:58,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 1728 events. 1033/1728 cut-off events. For 24450/24464 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9006 event pairs, 244 based on Foata normal form. 26/1747 useless extension candidates. Maximal degree in co-relation 9385. Up to 1402 conditions per place. [2024-06-28 02:22:58,406 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 108 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-28 02:22:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1668 flow [2024-06-28 02:22:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 02:22:58,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2024-06-28 02:22:58,408 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1192 flow. Second operand 6 states and 151 transitions. [2024-06-28 02:22:58,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1668 flow [2024-06-28 02:22:58,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1605 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:22:58,431 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 1247 flow [2024-06-28 02:22:58,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1247, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2024-06-28 02:22:58,432 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2024-06-28 02:22:58,432 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 1247 flow [2024-06-28 02:22:58,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:58,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:58,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:58,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:22:58,433 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)] === [2024-06-28 02:22:58,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 697487589, now seen corresponding path program 3 times [2024-06-28 02:22:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:58,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922503068] [2024-06-28 02:22:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:58,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:58,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922503068] [2024-06-28 02:22:58,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922503068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:58,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:58,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:58,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230395160] [2024-06-28 02:22:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:58,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:58,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:58,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 1247 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:58,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:58,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:58,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:58,729 INFO L124 PetriNetUnfolderBase]: 1099/1830 cut-off events. [2024-06-28 02:22:58,729 INFO L125 PetriNetUnfolderBase]: For 26022/26036 co-relation queries the response was YES. [2024-06-28 02:22:58,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10082 conditions, 1830 events. 1099/1830 cut-off events. For 26022/26036 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9612 event pairs, 225 based on Foata normal form. 26/1849 useless extension candidates. Maximal degree in co-relation 10030. Up to 1285 conditions per place. [2024-06-28 02:22:58,742 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-28 02:22:58,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 156 transitions, 1815 flow [2024-06-28 02:22:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 02:22:58,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-28 02:22:58,743 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 1247 flow. Second operand 6 states and 155 transitions. [2024-06-28 02:22:58,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 156 transitions, 1815 flow [2024-06-28 02:22:58,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1723 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:58,782 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 1294 flow [2024-06-28 02:22:58,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2024-06-28 02:22:58,783 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 68 predicate places. [2024-06-28 02:22:58,783 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 1294 flow [2024-06-28 02:22:58,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:58,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:58,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:58,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:22:58,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:58,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1806019241, now seen corresponding path program 2 times [2024-06-28 02:22:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158973281] [2024-06-28 02:22:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:58,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:58,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158973281] [2024-06-28 02:22:58,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158973281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:58,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:58,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:58,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041925013] [2024-06-28 02:22:58,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:58,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:22:58,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 1294 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) [2024-06-28 02:22:58,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:58,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:22:58,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:59,043 INFO L124 PetriNetUnfolderBase]: 1047/1750 cut-off events. [2024-06-28 02:22:59,043 INFO L125 PetriNetUnfolderBase]: For 26937/26944 co-relation queries the response was YES. [2024-06-28 02:22:59,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1750 events. 1047/1750 cut-off events. For 26937/26944 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9309 event pairs, 262 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 9879. Up to 1481 conditions per place. [2024-06-28 02:22:59,058 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 90 selfloop transitions, 36 changer transitions 0/139 dead transitions. [2024-06-28 02:22:59,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 139 transitions, 1685 flow [2024-06-28 02:22:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:22:59,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-28 02:22:59,059 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 1294 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:22:59,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 139 transitions, 1685 flow [2024-06-28 02:22:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 139 transitions, 1610 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 02:22:59,092 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1335 flow [2024-06-28 02:22:59,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1335, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-28 02:22:59,093 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 71 predicate places. [2024-06-28 02:22:59,093 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1335 flow [2024-06-28 02:22:59,093 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) [2024-06-28 02:22:59,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:59,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:59,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:22:59,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:59,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1314658383, now seen corresponding path program 1 times [2024-06-28 02:22:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652508457] [2024-06-28 02:22:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652508457] [2024-06-28 02:22:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652508457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:59,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:59,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184783610] [2024-06-28 02:22:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:59,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:22:59,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1335 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) [2024-06-28 02:22:59,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:59,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:22:59,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:59,374 INFO L124 PetriNetUnfolderBase]: 1061/1782 cut-off events. [2024-06-28 02:22:59,375 INFO L125 PetriNetUnfolderBase]: For 28938/28943 co-relation queries the response was YES. [2024-06-28 02:22:59,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10023 conditions, 1782 events. 1061/1782 cut-off events. For 28938/28943 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9525 event pairs, 247 based on Foata normal form. 15/1780 useless extension candidates. Maximal degree in co-relation 9968. Up to 1534 conditions per place. [2024-06-28 02:22:59,387 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 116 selfloop transitions, 14 changer transitions 0/143 dead transitions. [2024-06-28 02:22:59,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 143 transitions, 1663 flow [2024-06-28 02:22:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:22:59,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-28 02:22:59,390 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1335 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:22:59,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 143 transitions, 1663 flow [2024-06-28 02:22:59,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 1558 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:59,426 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1290 flow [2024-06-28 02:22:59,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1290, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-28 02:22:59,427 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-28 02:22:59,427 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1290 flow [2024-06-28 02:22:59,427 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) [2024-06-28 02:22:59,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:59,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:59,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:22:59,428 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:59,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash -452333815, now seen corresponding path program 1 times [2024-06-28 02:22:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219382312] [2024-06-28 02:22:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:59,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:59,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219382312] [2024-06-28 02:22:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219382312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:59,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676948109] [2024-06-28 02:22:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:59,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:22:59,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1290 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:59,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:59,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:22:59,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:59,936 INFO L124 PetriNetUnfolderBase]: 1679/2879 cut-off events. [2024-06-28 02:22:59,936 INFO L125 PetriNetUnfolderBase]: For 57721/57735 co-relation queries the response was YES. [2024-06-28 02:22:59,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2879 events. 1679/2879 cut-off events. For 57721/57735 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17512 event pairs, 441 based on Foata normal form. 50/2928 useless extension candidates. Maximal degree in co-relation 16069. Up to 1290 conditions per place. [2024-06-28 02:22:59,956 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 136 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-28 02:22:59,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 192 transitions, 2144 flow [2024-06-28 02:22:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:22:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:22:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:22:59,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 02:22:59,958 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1290 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:22:59,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 192 transitions, 2144 flow [2024-06-28 02:23:00,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 2106 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:00,014 INFO L231 Difference]: Finished difference. Result has 120 places, 133 transitions, 1448 flow [2024-06-28 02:23:00,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1448, PETRI_PLACES=120, PETRI_TRANSITIONS=133} [2024-06-28 02:23:00,015 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-28 02:23:00,015 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 133 transitions, 1448 flow [2024-06-28 02:23:00,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:00,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:00,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:00,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:23:00,016 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:00,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1140595191, now seen corresponding path program 2 times [2024-06-28 02:23:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:00,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271832541] [2024-06-28 02:23:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:00,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:00,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271832541] [2024-06-28 02:23:00,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271832541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:00,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:00,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313145093] [2024-06-28 02:23:00,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:00,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:00,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:00,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:00,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:00,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 133 transitions, 1448 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:00,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:00,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:00,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:00,633 INFO L124 PetriNetUnfolderBase]: 2069/3581 cut-off events. [2024-06-28 02:23:00,633 INFO L125 PetriNetUnfolderBase]: For 80954/80968 co-relation queries the response was YES. [2024-06-28 02:23:00,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3581 events. 2069/3581 cut-off events. For 80954/80968 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23151 event pairs, 738 based on Foata normal form. 50/3630 useless extension candidates. Maximal degree in co-relation 20629. Up to 2374 conditions per place. [2024-06-28 02:23:00,667 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 135 selfloop transitions, 49 changer transitions 0/191 dead transitions. [2024-06-28 02:23:00,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 191 transitions, 2262 flow [2024-06-28 02:23:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-28 02:23:00,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435897435897436 [2024-06-28 02:23:00,668 INFO L175 Difference]: Start difference. First operand has 120 places, 133 transitions, 1448 flow. Second operand 10 states and 251 transitions. [2024-06-28 02:23:00,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 191 transitions, 2262 flow [2024-06-28 02:23:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2154 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:00,772 INFO L231 Difference]: Finished difference. Result has 126 places, 135 transitions, 1513 flow [2024-06-28 02:23:00,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1513, PETRI_PLACES=126, PETRI_TRANSITIONS=135} [2024-06-28 02:23:00,773 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-28 02:23:00,773 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 135 transitions, 1513 flow [2024-06-28 02:23:00,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:00,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:00,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:23:00,774 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1140447321, now seen corresponding path program 3 times [2024-06-28 02:23:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:00,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603237734] [2024-06-28 02:23:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:00,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:00,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603237734] [2024-06-28 02:23:00,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603237734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:00,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:00,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:00,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793945463] [2024-06-28 02:23:00,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:00,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:00,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:00,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 135 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:00,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:00,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:00,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:01,357 INFO L124 PetriNetUnfolderBase]: 2142/3706 cut-off events. [2024-06-28 02:23:01,357 INFO L125 PetriNetUnfolderBase]: For 86523/86537 co-relation queries the response was YES. [2024-06-28 02:23:01,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3706 events. 2142/3706 cut-off events. For 86523/86537 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24220 event pairs, 829 based on Foata normal form. 56/3753 useless extension candidates. Maximal degree in co-relation 20935. Up to 2945 conditions per place. [2024-06-28 02:23:01,383 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 49 changer transitions 0/180 dead transitions. [2024-06-28 02:23:01,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 2127 flow [2024-06-28 02:23:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-28 02:23:01,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.617948717948718 [2024-06-28 02:23:01,384 INFO L175 Difference]: Start difference. First operand has 126 places, 135 transitions, 1513 flow. Second operand 10 states and 241 transitions. [2024-06-28 02:23:01,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 2127 flow [2024-06-28 02:23:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 2004 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:01,474 INFO L231 Difference]: Finished difference. Result has 129 places, 136 transitions, 1534 flow [2024-06-28 02:23:01,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1534, PETRI_PLACES=129, PETRI_TRANSITIONS=136} [2024-06-28 02:23:01,475 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-28 02:23:01,475 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 136 transitions, 1534 flow [2024-06-28 02:23:01,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:01,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:01,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:01,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:23:01,476 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)] === [2024-06-28 02:23:01,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1233958013, now seen corresponding path program 1 times [2024-06-28 02:23:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:01,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75048177] [2024-06-28 02:23:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:01,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75048177] [2024-06-28 02:23:01,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75048177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:01,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:01,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:01,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207981190] [2024-06-28 02:23:01,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:01,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:01,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 136 transitions, 1534 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:01,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:01,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:01,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:01,971 INFO L124 PetriNetUnfolderBase]: 2147/3723 cut-off events. [2024-06-28 02:23:01,971 INFO L125 PetriNetUnfolderBase]: For 77161/77169 co-relation queries the response was YES. [2024-06-28 02:23:01,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21118 conditions, 3723 events. 2147/3723 cut-off events. For 77161/77169 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24314 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21058. Up to 3375 conditions per place. [2024-06-28 02:23:01,995 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 139 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-28 02:23:01,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 165 transitions, 2106 flow [2024-06-28 02:23:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-28 02:23:01,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:23:01,999 INFO L175 Difference]: Start difference. First operand has 129 places, 136 transitions, 1534 flow. Second operand 7 states and 156 transitions. [2024-06-28 02:23:01,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 165 transitions, 2106 flow [2024-06-28 02:23:02,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 165 transitions, 1964 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:02,092 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1614 flow [2024-06-28 02:23:02,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1614, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-28 02:23:02,093 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-28 02:23:02,093 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1614 flow [2024-06-28 02:23:02,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:02,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:02,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:02,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:23:02,093 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:02,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1056021391, now seen corresponding path program 4 times [2024-06-28 02:23:02,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:02,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319945508] [2024-06-28 02:23:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:02,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319945508] [2024-06-28 02:23:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319945508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:02,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422387309] [2024-06-28 02:23:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:02,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:02,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:02,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:02,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:02,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:02,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:02,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:02,735 INFO L124 PetriNetUnfolderBase]: 2281/3951 cut-off events. [2024-06-28 02:23:02,735 INFO L125 PetriNetUnfolderBase]: For 96503/96517 co-relation queries the response was YES. [2024-06-28 02:23:02,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22026 conditions, 3951 events. 2281/3951 cut-off events. For 96503/96517 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26043 event pairs, 908 based on Foata normal form. 56/4006 useless extension candidates. Maximal degree in co-relation 21964. Up to 3264 conditions per place. [2024-06-28 02:23:02,763 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 51 changer transitions 3/185 dead transitions. [2024-06-28 02:23:02,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2174 flow [2024-06-28 02:23:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-28 02:23:02,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-28 02:23:02,764 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1614 flow. Second operand 9 states and 219 transitions. [2024-06-28 02:23:02,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2174 flow [2024-06-28 02:23:02,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 2147 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 02:23:02,877 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1724 flow [2024-06-28 02:23:02,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-28 02:23:02,882 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-28 02:23:02,882 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1724 flow [2024-06-28 02:23:02,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:02,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:02,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:02,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:23:02,883 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:02,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash 654581351, now seen corresponding path program 5 times [2024-06-28 02:23:02,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:02,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253823180] [2024-06-28 02:23:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:02,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253823180] [2024-06-28 02:23:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253823180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:02,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:02,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:02,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120048299] [2024-06-28 02:23:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:03,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:03,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1724 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:03,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:03,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:03,565 INFO L124 PetriNetUnfolderBase]: 2405/4165 cut-off events. [2024-06-28 02:23:03,565 INFO L125 PetriNetUnfolderBase]: For 107369/107383 co-relation queries the response was YES. [2024-06-28 02:23:03,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23292 conditions, 4165 events. 2405/4165 cut-off events. For 107369/107383 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27803 event pairs, 955 based on Foata normal form. 56/4216 useless extension candidates. Maximal degree in co-relation 23228. Up to 3434 conditions per place. [2024-06-28 02:23:03,597 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 46 changer transitions 0/180 dead transitions. [2024-06-28 02:23:03,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2266 flow [2024-06-28 02:23:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:23:03,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-06-28 02:23:03,598 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1724 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:23:03,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2266 flow [2024-06-28 02:23:03,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2135 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:03,713 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1735 flow [2024-06-28 02:23:03,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1735, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-06-28 02:23:03,714 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-28 02:23:03,714 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1735 flow [2024-06-28 02:23:03,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:03,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:03,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:03,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:23:03,715 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:03,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 654433481, now seen corresponding path program 6 times [2024-06-28 02:23:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455238048] [2024-06-28 02:23:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:03,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:03,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455238048] [2024-06-28 02:23:03,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455238048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:03,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:03,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344072742] [2024-06-28 02:23:03,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:03,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:03,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:03,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1735 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:03,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:03,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:03,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:04,439 INFO L124 PetriNetUnfolderBase]: 2475/4331 cut-off events. [2024-06-28 02:23:04,439 INFO L125 PetriNetUnfolderBase]: For 106436/106450 co-relation queries the response was YES. [2024-06-28 02:23:04,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23412 conditions, 4331 events. 2475/4331 cut-off events. For 106436/106450 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29459 event pairs, 851 based on Foata normal form. 50/4380 useless extension candidates. Maximal degree in co-relation 23347. Up to 2675 conditions per place. [2024-06-28 02:23:04,474 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 135 selfloop transitions, 47 changer transitions 0/189 dead transitions. [2024-06-28 02:23:04,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 189 transitions, 2413 flow [2024-06-28 02:23:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:23:04,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673992673992674 [2024-06-28 02:23:04,475 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1735 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:23:04,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 189 transitions, 2413 flow [2024-06-28 02:23:04,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 2291 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:04,603 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1801 flow [2024-06-28 02:23:04,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-28 02:23:04,604 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 99 predicate places. [2024-06-28 02:23:04,604 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1801 flow [2024-06-28 02:23:04,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:04,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:04,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:04,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:23:04,604 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:04,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash 660158933, now seen corresponding path program 1 times [2024-06-28 02:23:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088789994] [2024-06-28 02:23:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:04,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:04,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088789994] [2024-06-28 02:23:04,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088789994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:04,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:04,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:04,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640635417] [2024-06-28 02:23:04,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:04,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:04,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:04,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:04,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:04,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:04,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:04,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:05,324 INFO L124 PetriNetUnfolderBase]: 2584/4522 cut-off events. [2024-06-28 02:23:05,324 INFO L125 PetriNetUnfolderBase]: For 115805/115819 co-relation queries the response was YES. [2024-06-28 02:23:05,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 4522 events. 2584/4522 cut-off events. For 115805/115819 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31118 event pairs, 910 based on Foata normal form. 50/4567 useless extension candidates. Maximal degree in co-relation 24328. Up to 3238 conditions per place. [2024-06-28 02:23:05,357 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 55 changer transitions 5/194 dead transitions. [2024-06-28 02:23:05,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 2427 flow [2024-06-28 02:23:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-28 02:23:05,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-28 02:23:05,358 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1801 flow. Second operand 9 states and 224 transitions. [2024-06-28 02:23:05,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 2427 flow [2024-06-28 02:23:05,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 2282 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:05,530 INFO L231 Difference]: Finished difference. Result has 143 places, 148 transitions, 1793 flow [2024-06-28 02:23:05,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1793, PETRI_PLACES=143, PETRI_TRANSITIONS=148} [2024-06-28 02:23:05,531 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-28 02:23:05,531 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 148 transitions, 1793 flow [2024-06-28 02:23:05,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:05,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:05,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:23:05,531 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)] === [2024-06-28 02:23:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1270899473, now seen corresponding path program 2 times [2024-06-28 02:23:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088169106] [2024-06-28 02:23:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:05,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088169106] [2024-06-28 02:23:05,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088169106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:05,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:05,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:05,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065680092] [2024-06-28 02:23:05,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:05,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:05,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:05,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 148 transitions, 1793 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:05,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:05,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:05,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:06,033 INFO L124 PetriNetUnfolderBase]: 2407/4219 cut-off events. [2024-06-28 02:23:06,034 INFO L125 PetriNetUnfolderBase]: For 102126/102128 co-relation queries the response was YES. [2024-06-28 02:23:06,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23137 conditions, 4219 events. 2407/4219 cut-off events. For 102126/102128 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28514 event pairs, 992 based on Foata normal form. 1/4218 useless extension candidates. Maximal degree in co-relation 23069. Up to 3849 conditions per place. [2024-06-28 02:23:06,065 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 133 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-28 02:23:06,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 158 transitions, 2124 flow [2024-06-28 02:23:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:23:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:23:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-28 02:23:06,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-28 02:23:06,066 INFO L175 Difference]: Start difference. First operand has 143 places, 148 transitions, 1793 flow. Second operand 5 states and 115 transitions. [2024-06-28 02:23:06,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 158 transitions, 2124 flow [2024-06-28 02:23:06,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 158 transitions, 1974 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:06,196 INFO L231 Difference]: Finished difference. Result has 141 places, 148 transitions, 1685 flow [2024-06-28 02:23:06,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1685, PETRI_PLACES=141, PETRI_TRANSITIONS=148} [2024-06-28 02:23:06,197 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 101 predicate places. [2024-06-28 02:23:06,197 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 148 transitions, 1685 flow [2024-06-28 02:23:06,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:06,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:06,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:23:06,197 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:06,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash 101075059, now seen corresponding path program 7 times [2024-06-28 02:23:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914074375] [2024-06-28 02:23:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:06,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:06,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914074375] [2024-06-28 02:23:06,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914074375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:06,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:06,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:06,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931220269] [2024-06-28 02:23:06,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:06,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:06,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:06,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:06,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 1685 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:06,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:06,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:06,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:06,851 INFO L124 PetriNetUnfolderBase]: 2516/4401 cut-off events. [2024-06-28 02:23:06,852 INFO L125 PetriNetUnfolderBase]: For 126242/126256 co-relation queries the response was YES. [2024-06-28 02:23:06,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23609 conditions, 4401 events. 2516/4401 cut-off events. For 126242/126256 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29957 event pairs, 1035 based on Foata normal form. 56/4448 useless extension candidates. Maximal degree in co-relation 23540. Up to 3637 conditions per place. [2024-06-28 02:23:06,887 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 116 selfloop transitions, 68 changer transitions 3/194 dead transitions. [2024-06-28 02:23:06,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 194 transitions, 2489 flow [2024-06-28 02:23:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-28 02:23:06,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-28 02:23:06,888 INFO L175 Difference]: Start difference. First operand has 141 places, 148 transitions, 1685 flow. Second operand 9 states and 225 transitions. [2024-06-28 02:23:06,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 194 transitions, 2489 flow [2024-06-28 02:23:07,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 194 transitions, 2453 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:07,038 INFO L231 Difference]: Finished difference. Result has 146 places, 148 transitions, 1835 flow [2024-06-28 02:23:07,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1835, PETRI_PLACES=146, PETRI_TRANSITIONS=148} [2024-06-28 02:23:07,039 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2024-06-28 02:23:07,039 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 148 transitions, 1835 flow [2024-06-28 02:23:07,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:07,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:07,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:23:07,040 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:07,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -118417609, now seen corresponding path program 2 times [2024-06-28 02:23:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760103553] [2024-06-28 02:23:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:07,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760103553] [2024-06-28 02:23:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760103553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072776911] [2024-06-28 02:23:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:07,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:07,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 148 transitions, 1835 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:07,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:07,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:07,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:07,709 INFO L124 PetriNetUnfolderBase]: 2615/4600 cut-off events. [2024-06-28 02:23:07,710 INFO L125 PetriNetUnfolderBase]: For 134900/134914 co-relation queries the response was YES. [2024-06-28 02:23:07,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24894 conditions, 4600 events. 2615/4600 cut-off events. For 134900/134914 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31845 event pairs, 1035 based on Foata normal form. 50/4641 useless extension candidates. Maximal degree in co-relation 24824. Up to 3573 conditions per place. [2024-06-28 02:23:07,738 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 121 selfloop transitions, 70 changer transitions 6/204 dead transitions. [2024-06-28 02:23:07,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 204 transitions, 2715 flow [2024-06-28 02:23:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-28 02:23:07,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-28 02:23:07,740 INFO L175 Difference]: Start difference. First operand has 146 places, 148 transitions, 1835 flow. Second operand 10 states and 250 transitions. [2024-06-28 02:23:07,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 204 transitions, 2715 flow [2024-06-28 02:23:07,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 204 transitions, 2542 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:07,889 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1849 flow [2024-06-28 02:23:07,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1849, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2024-06-28 02:23:07,890 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-28 02:23:07,890 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1849 flow [2024-06-28 02:23:07,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:07,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:07,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:07,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:23:07,891 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:07,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash 147279671, now seen corresponding path program 3 times [2024-06-28 02:23:07,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:07,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203290522] [2024-06-28 02:23:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:07,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203290522] [2024-06-28 02:23:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203290522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:07,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:07,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251173169] [2024-06-28 02:23:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:08,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:08,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1849 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:08,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:08,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:08,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:08,550 INFO L124 PetriNetUnfolderBase]: 2760/4829 cut-off events. [2024-06-28 02:23:08,550 INFO L125 PetriNetUnfolderBase]: For 148404/148418 co-relation queries the response was YES. [2024-06-28 02:23:08,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25987 conditions, 4829 events. 2760/4829 cut-off events. For 148404/148418 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33660 event pairs, 1000 based on Foata normal form. 50/4868 useless extension candidates. Maximal degree in co-relation 25916. Up to 2795 conditions per place. [2024-06-28 02:23:08,586 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 113 selfloop transitions, 75 changer transitions 8/203 dead transitions. [2024-06-28 02:23:08,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2711 flow [2024-06-28 02:23:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-28 02:23:08,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6609686609686609 [2024-06-28 02:23:08,588 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1849 flow. Second operand 9 states and 232 transitions. [2024-06-28 02:23:08,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2711 flow [2024-06-28 02:23:08,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 2531 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:08,772 INFO L231 Difference]: Finished difference. Result has 149 places, 145 transitions, 1732 flow [2024-06-28 02:23:08,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=149, PETRI_TRANSITIONS=145} [2024-06-28 02:23:08,772 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-28 02:23:08,772 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 145 transitions, 1732 flow [2024-06-28 02:23:08,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:08,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:08,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:08,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:23:08,773 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)] === [2024-06-28 02:23:08,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:08,773 INFO L85 PathProgramCache]: Analyzing trace with hash -177938721, now seen corresponding path program 3 times [2024-06-28 02:23:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84179458] [2024-06-28 02:23:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:08,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:08,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84179458] [2024-06-28 02:23:08,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84179458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:08,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093556821] [2024-06-28 02:23:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:08,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:08,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:08,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:08,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:08,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 145 transitions, 1732 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:08,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:08,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:09,259 INFO L124 PetriNetUnfolderBase]: 2484/4367 cut-off events. [2024-06-28 02:23:09,259 INFO L125 PetriNetUnfolderBase]: For 133040/133042 co-relation queries the response was YES. [2024-06-28 02:23:09,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24297 conditions, 4367 events. 2484/4367 cut-off events. For 133040/133042 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29872 event pairs, 1053 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 24225. Up to 3987 conditions per place. [2024-06-28 02:23:09,293 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 131 selfloop transitions, 23 changer transitions 0/161 dead transitions. [2024-06-28 02:23:09,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 161 transitions, 2128 flow [2024-06-28 02:23:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-28 02:23:09,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-28 02:23:09,294 INFO L175 Difference]: Start difference. First operand has 149 places, 145 transitions, 1732 flow. Second operand 6 states and 132 transitions. [2024-06-28 02:23:09,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 161 transitions, 2128 flow [2024-06-28 02:23:09,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 161 transitions, 1920 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:09,443 INFO L231 Difference]: Finished difference. Result has 149 places, 150 transitions, 1647 flow [2024-06-28 02:23:09,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1647, PETRI_PLACES=149, PETRI_TRANSITIONS=150} [2024-06-28 02:23:09,444 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-28 02:23:09,444 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 150 transitions, 1647 flow [2024-06-28 02:23:09,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:09,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:09,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:09,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:23:09,444 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)] === [2024-06-28 02:23:09,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash -392739824, now seen corresponding path program 1 times [2024-06-28 02:23:09,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:09,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043605521] [2024-06-28 02:23:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:09,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:09,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:09,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043605521] [2024-06-28 02:23:09,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043605521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:09,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:09,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:09,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116997044] [2024-06-28 02:23:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:09,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:09,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:09,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:23:09,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 150 transitions, 1647 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) [2024-06-28 02:23:09,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:09,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:23:09,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:10,026 INFO L124 PetriNetUnfolderBase]: 2333/4143 cut-off events. [2024-06-28 02:23:10,026 INFO L125 PetriNetUnfolderBase]: For 126659/126666 co-relation queries the response was YES. [2024-06-28 02:23:10,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 4143 events. 2333/4143 cut-off events. For 126659/126666 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28394 event pairs, 926 based on Foata normal form. 17/4139 useless extension candidates. Maximal degree in co-relation 22173. Up to 3620 conditions per place. [2024-06-28 02:23:10,053 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 123 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-28 02:23:10,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 169 transitions, 2043 flow [2024-06-28 02:23:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:23:10,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 02:23:10,054 INFO L175 Difference]: Start difference. First operand has 149 places, 150 transitions, 1647 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:23:10,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 169 transitions, 2043 flow [2024-06-28 02:23:10,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 169 transitions, 1979 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:10,197 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 1693 flow [2024-06-28 02:23:10,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1693, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2024-06-28 02:23:10,198 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-28 02:23:10,198 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 1693 flow [2024-06-28 02:23:10,198 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) [2024-06-28 02:23:10,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:10,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:10,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:23:10,199 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)] === [2024-06-28 02:23:10,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash 653020910, now seen corresponding path program 2 times [2024-06-28 02:23:10,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:10,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843065320] [2024-06-28 02:23:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:10,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843065320] [2024-06-28 02:23:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843065320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:10,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:10,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:10,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197804797] [2024-06-28 02:23:10,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:10,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:10,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:10,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:10,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:23:10,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 1693 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) [2024-06-28 02:23:10,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:10,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:23:10,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:10,715 INFO L124 PetriNetUnfolderBase]: 2373/4200 cut-off events. [2024-06-28 02:23:10,716 INFO L125 PetriNetUnfolderBase]: For 134565/134572 co-relation queries the response was YES. [2024-06-28 02:23:10,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22963 conditions, 4200 events. 2373/4200 cut-off events. For 134565/134572 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28767 event pairs, 977 based on Foata normal form. 17/4194 useless extension candidates. Maximal degree in co-relation 22888. Up to 3702 conditions per place. [2024-06-28 02:23:10,748 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-28 02:23:10,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 170 transitions, 2231 flow [2024-06-28 02:23:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:23:10,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 02:23:10,749 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 1693 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:23:10,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 170 transitions, 2231 flow [2024-06-28 02:23:10,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 170 transitions, 2157 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:10,913 INFO L231 Difference]: Finished difference. Result has 154 places, 154 transitions, 1748 flow [2024-06-28 02:23:10,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1748, PETRI_PLACES=154, PETRI_TRANSITIONS=154} [2024-06-28 02:23:10,914 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-28 02:23:10,914 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 154 transitions, 1748 flow [2024-06-28 02:23:10,914 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) [2024-06-28 02:23:10,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:10,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:10,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:23:10,914 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)] === [2024-06-28 02:23:10,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 666353390, now seen corresponding path program 3 times [2024-06-28 02:23:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:10,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500452821] [2024-06-28 02:23:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:10,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:10,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500452821] [2024-06-28 02:23:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500452821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:10,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:10,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617814939] [2024-06-28 02:23:10,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:11,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 02:23:11,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 154 transitions, 1748 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) [2024-06-28 02:23:11,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:11,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 02:23:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:11,533 INFO L124 PetriNetUnfolderBase]: 2438/4301 cut-off events. [2024-06-28 02:23:11,533 INFO L125 PetriNetUnfolderBase]: For 144931/144938 co-relation queries the response was YES. [2024-06-28 02:23:11,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23775 conditions, 4301 events. 2438/4301 cut-off events. For 144931/144938 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29532 event pairs, 944 based on Foata normal form. 17/4295 useless extension candidates. Maximal degree in co-relation 23699. Up to 3605 conditions per place. [2024-06-28 02:23:11,570 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 44 changer transitions 0/178 dead transitions. [2024-06-28 02:23:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 2424 flow [2024-06-28 02:23:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:23:11,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-28 02:23:11,571 INFO L175 Difference]: Start difference. First operand has 154 places, 154 transitions, 1748 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:23:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 2424 flow [2024-06-28 02:23:11,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 178 transitions, 2319 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:11,725 INFO L231 Difference]: Finished difference. Result has 156 places, 157 transitions, 1800 flow [2024-06-28 02:23:11,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1800, PETRI_PLACES=156, PETRI_TRANSITIONS=157} [2024-06-28 02:23:11,726 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-06-28 02:23:11,726 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 157 transitions, 1800 flow [2024-06-28 02:23:11,726 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) [2024-06-28 02:23:11,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:11,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:23:11,726 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)] === [2024-06-28 02:23:11,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash 417001180, now seen corresponding path program 1 times [2024-06-28 02:23:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:11,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733263049] [2024-06-28 02:23:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:11,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:11,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733263049] [2024-06-28 02:23:11,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733263049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:11,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:11,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:11,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832768673] [2024-06-28 02:23:11,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:11,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:11,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:11,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:11,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 157 transitions, 1800 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:11,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:11,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:11,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:12,386 INFO L124 PetriNetUnfolderBase]: 2511/4408 cut-off events. [2024-06-28 02:23:12,386 INFO L125 PetriNetUnfolderBase]: For 145782/145794 co-relation queries the response was YES. [2024-06-28 02:23:12,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24514 conditions, 4408 events. 2511/4408 cut-off events. For 145782/145794 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30142 event pairs, 1011 based on Foata normal form. 14/4421 useless extension candidates. Maximal degree in co-relation 24437. Up to 3889 conditions per place. [2024-06-28 02:23:12,419 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 55 changer transitions 1/193 dead transitions. [2024-06-28 02:23:12,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 193 transitions, 2428 flow [2024-06-28 02:23:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-28 02:23:12,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096866096866097 [2024-06-28 02:23:12,421 INFO L175 Difference]: Start difference. First operand has 156 places, 157 transitions, 1800 flow. Second operand 9 states and 214 transitions. [2024-06-28 02:23:12,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 193 transitions, 2428 flow [2024-06-28 02:23:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 193 transitions, 2347 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 02:23:12,591 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1856 flow [2024-06-28 02:23:12,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1856, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2024-06-28 02:23:12,591 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-28 02:23:12,591 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1856 flow [2024-06-28 02:23:12,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:12,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:12,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:12,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:23:12,592 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)] === [2024-06-28 02:23:12,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:12,592 INFO L85 PathProgramCache]: Analyzing trace with hash 422715100, now seen corresponding path program 2 times [2024-06-28 02:23:12,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:12,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277599381] [2024-06-28 02:23:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:12,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:12,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:12,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277599381] [2024-06-28 02:23:12,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277599381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:12,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:12,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:12,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814120276] [2024-06-28 02:23:12,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:12,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:12,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:12,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:12,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1856 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:12,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:12,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:12,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:13,226 INFO L124 PetriNetUnfolderBase]: 2530/4439 cut-off events. [2024-06-28 02:23:13,226 INFO L125 PetriNetUnfolderBase]: For 153187/153199 co-relation queries the response was YES. [2024-06-28 02:23:13,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24995 conditions, 4439 events. 2530/4439 cut-off events. For 153187/153199 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30362 event pairs, 1011 based on Foata normal form. 13/4451 useless extension candidates. Maximal degree in co-relation 24916. Up to 3908 conditions per place. [2024-06-28 02:23:13,255 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 61 changer transitions 1/192 dead transitions. [2024-06-28 02:23:13,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 192 transitions, 2540 flow [2024-06-28 02:23:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-28 02:23:13,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-28 02:23:13,256 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1856 flow. Second operand 8 states and 189 transitions. [2024-06-28 02:23:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 192 transitions, 2540 flow [2024-06-28 02:23:13,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 192 transitions, 2434 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:13,474 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1985 flow [2024-06-28 02:23:13,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1985, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2024-06-28 02:23:13,475 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-28 02:23:13,475 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1985 flow [2024-06-28 02:23:13,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:13,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:13,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:13,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:23:13,475 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)] === [2024-06-28 02:23:13,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash 414141244, now seen corresponding path program 1 times [2024-06-28 02:23:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050801946] [2024-06-28 02:23:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050801946] [2024-06-28 02:23:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050801946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:13,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:13,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417578795] [2024-06-28 02:23:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:13,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:13,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:13,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 1985 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:13,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:13,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:13,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:14,063 INFO L124 PetriNetUnfolderBase]: 2548/4467 cut-off events. [2024-06-28 02:23:14,063 INFO L125 PetriNetUnfolderBase]: For 164547/164555 co-relation queries the response was YES. [2024-06-28 02:23:14,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25352 conditions, 4467 events. 2548/4467 cut-off events. For 164547/164555 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30450 event pairs, 910 based on Foata normal form. 14/4480 useless extension candidates. Maximal degree in co-relation 25271. Up to 3976 conditions per place. [2024-06-28 02:23:14,100 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 166 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2024-06-28 02:23:14,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 196 transitions, 2549 flow [2024-06-28 02:23:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:23:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 02:23:14,101 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1985 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:23:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 196 transitions, 2549 flow [2024-06-28 02:23:14,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 196 transitions, 2464 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:14,337 INFO L231 Difference]: Finished difference. Result has 170 places, 166 transitions, 1959 flow [2024-06-28 02:23:14,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=170, PETRI_TRANSITIONS=166} [2024-06-28 02:23:14,338 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-28 02:23:14,338 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 166 transitions, 1959 flow [2024-06-28 02:23:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:14,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:14,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:23:14,338 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)] === [2024-06-28 02:23:14,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash 414380254, now seen corresponding path program 2 times [2024-06-28 02:23:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:14,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488813783] [2024-06-28 02:23:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:14,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488813783] [2024-06-28 02:23:14,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488813783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:14,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:14,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803233997] [2024-06-28 02:23:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:14,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:14,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:14,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 166 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:14,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:14,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:14,966 INFO L124 PetriNetUnfolderBase]: 2576/4511 cut-off events. [2024-06-28 02:23:14,966 INFO L125 PetriNetUnfolderBase]: For 173851/173859 co-relation queries the response was YES. [2024-06-28 02:23:14,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25661 conditions, 4511 events. 2576/4511 cut-off events. For 173851/173859 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30823 event pairs, 1004 based on Foata normal form. 16/4526 useless extension candidates. Maximal degree in co-relation 25579. Up to 4096 conditions per place. [2024-06-28 02:23:15,003 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 163 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-28 02:23:15,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 190 transitions, 2411 flow [2024-06-28 02:23:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 02:23:15,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-28 02:23:15,004 INFO L175 Difference]: Start difference. First operand has 170 places, 166 transitions, 1959 flow. Second operand 8 states and 174 transitions. [2024-06-28 02:23:15,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 190 transitions, 2411 flow [2024-06-28 02:23:15,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 190 transitions, 2372 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:15,272 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 1978 flow [2024-06-28 02:23:15,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-06-28 02:23:15,272 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-28 02:23:15,272 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 1978 flow [2024-06-28 02:23:15,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:15,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:15,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:23:15,273 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)] === [2024-06-28 02:23:15,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash 532292350, now seen corresponding path program 3 times [2024-06-28 02:23:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:15,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532542343] [2024-06-28 02:23:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:15,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532542343] [2024-06-28 02:23:15,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532542343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:15,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:15,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:15,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789256298] [2024-06-28 02:23:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:15,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:15,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 1978 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:15,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:15,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:15,918 INFO L124 PetriNetUnfolderBase]: 2570/4505 cut-off events. [2024-06-28 02:23:15,919 INFO L125 PetriNetUnfolderBase]: For 174908/174920 co-relation queries the response was YES. [2024-06-28 02:23:15,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25704 conditions, 4505 events. 2570/4505 cut-off events. For 174908/174920 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30833 event pairs, 1017 based on Foata normal form. 14/4518 useless extension candidates. Maximal degree in co-relation 25621. Up to 4014 conditions per place. [2024-06-28 02:23:15,958 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 132 selfloop transitions, 47 changer transitions 1/187 dead transitions. [2024-06-28 02:23:15,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 187 transitions, 2470 flow [2024-06-28 02:23:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:23:15,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-28 02:23:15,959 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 1978 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:23:15,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 187 transitions, 2470 flow [2024-06-28 02:23:16,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 187 transitions, 2427 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:16,251 INFO L231 Difference]: Finished difference. Result has 173 places, 166 transitions, 2029 flow [2024-06-28 02:23:16,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2029, PETRI_PLACES=173, PETRI_TRANSITIONS=166} [2024-06-28 02:23:16,251 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-28 02:23:16,251 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 166 transitions, 2029 flow [2024-06-28 02:23:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:16,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:16,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:16,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:23:16,252 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)] === [2024-06-28 02:23:16,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash 13774176, now seen corresponding path program 4 times [2024-06-28 02:23:16,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061937970] [2024-06-28 02:23:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:16,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061937970] [2024-06-28 02:23:16,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061937970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:16,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:16,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:16,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591441544] [2024-06-28 02:23:16,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:16,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:16,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:16,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:16,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 166 transitions, 2029 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:16,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:16,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:16,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:16,854 INFO L124 PetriNetUnfolderBase]: 2535/4440 cut-off events. [2024-06-28 02:23:16,855 INFO L125 PetriNetUnfolderBase]: For 181059/181071 co-relation queries the response was YES. [2024-06-28 02:23:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25591 conditions, 4440 events. 2535/4440 cut-off events. For 181059/181071 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30273 event pairs, 999 based on Foata normal form. 14/4453 useless extension candidates. Maximal degree in co-relation 25507. Up to 3955 conditions per place. [2024-06-28 02:23:16,892 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 48 changer transitions 2/187 dead transitions. [2024-06-28 02:23:16,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 187 transitions, 2441 flow [2024-06-28 02:23:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:23:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-28 02:23:16,896 INFO L175 Difference]: Start difference. First operand has 173 places, 166 transitions, 2029 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:23:16,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 187 transitions, 2441 flow [2024-06-28 02:23:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 187 transitions, 2355 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:17,245 INFO L231 Difference]: Finished difference. Result has 176 places, 164 transitions, 2020 flow [2024-06-28 02:23:17,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2020, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2024-06-28 02:23:17,247 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-28 02:23:17,248 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 2020 flow [2024-06-28 02:23:17,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:17,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:17,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:17,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:23:17,249 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)] === [2024-06-28 02:23:17,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:17,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1563719792, now seen corresponding path program 5 times [2024-06-28 02:23:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:17,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107319729] [2024-06-28 02:23:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:17,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107319729] [2024-06-28 02:23:17,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107319729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:17,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:17,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594025287] [2024-06-28 02:23:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:17,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:17,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:17,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:17,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:17,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:17,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 2020 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:17,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:17,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:17,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:17,821 INFO L124 PetriNetUnfolderBase]: 2422/4239 cut-off events. [2024-06-28 02:23:17,821 INFO L125 PetriNetUnfolderBase]: For 178902/178908 co-relation queries the response was YES. [2024-06-28 02:23:17,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24815 conditions, 4239 events. 2422/4239 cut-off events. For 178902/178908 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28572 event pairs, 960 based on Foata normal form. 5/4242 useless extension candidates. Maximal degree in co-relation 24731. Up to 3730 conditions per place. [2024-06-28 02:23:17,857 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 112 selfloop transitions, 57 changer transitions 2/178 dead transitions. [2024-06-28 02:23:17,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 2396 flow [2024-06-28 02:23:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 02:23:17,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824175824175825 [2024-06-28 02:23:17,858 INFO L175 Difference]: Start difference. First operand has 176 places, 164 transitions, 2020 flow. Second operand 7 states and 159 transitions. [2024-06-28 02:23:17,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 2396 flow [2024-06-28 02:23:18,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 178 transitions, 2215 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-28 02:23:18,172 INFO L231 Difference]: Finished difference. Result has 172 places, 162 transitions, 1936 flow [2024-06-28 02:23:18,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1936, PETRI_PLACES=172, PETRI_TRANSITIONS=162} [2024-06-28 02:23:18,173 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-28 02:23:18,173 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 162 transitions, 1936 flow [2024-06-28 02:23:18,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:18,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:18,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:23:18,173 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)] === [2024-06-28 02:23:18,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1563716816, now seen corresponding path program 3 times [2024-06-28 02:23:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:18,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348758276] [2024-06-28 02:23:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348758276] [2024-06-28 02:23:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348758276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655046491] [2024-06-28 02:23:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:18,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:18,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:18,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 162 transitions, 1936 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:18,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:18,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:18,705 INFO L124 PetriNetUnfolderBase]: 2321/4072 cut-off events. [2024-06-28 02:23:18,705 INFO L125 PetriNetUnfolderBase]: For 176678/176680 co-relation queries the response was YES. [2024-06-28 02:23:18,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23793 conditions, 4072 events. 2321/4072 cut-off events. For 176678/176680 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27237 event pairs, 895 based on Foata normal form. 8/4078 useless extension candidates. Maximal degree in co-relation 23710. Up to 3666 conditions per place. [2024-06-28 02:23:18,739 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 151 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-28 02:23:18,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 177 transitions, 2331 flow [2024-06-28 02:23:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 02:23:18,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-28 02:23:18,740 INFO L175 Difference]: Start difference. First operand has 172 places, 162 transitions, 1936 flow. Second operand 6 states and 134 transitions. [2024-06-28 02:23:18,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 177 transitions, 2331 flow [2024-06-28 02:23:19,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 177 transitions, 2178 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:19,041 INFO L231 Difference]: Finished difference. Result has 170 places, 162 transitions, 1826 flow [2024-06-28 02:23:19,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1826, PETRI_PLACES=170, PETRI_TRANSITIONS=162} [2024-06-28 02:23:19,042 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-28 02:23:19,042 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 162 transitions, 1826 flow [2024-06-28 02:23:19,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:19,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:19,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:19,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:23:19,042 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)] === [2024-06-28 02:23:19,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1564085778, now seen corresponding path program 1 times [2024-06-28 02:23:19,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:19,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475121886] [2024-06-28 02:23:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:19,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:19,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475121886] [2024-06-28 02:23:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475121886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:19,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662381794] [2024-06-28 02:23:19,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:19,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:19,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:19,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 162 transitions, 1826 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:19,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:19,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:19,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:19,647 INFO L124 PetriNetUnfolderBase]: 2341/4104 cut-off events. [2024-06-28 02:23:19,648 INFO L125 PetriNetUnfolderBase]: For 182460/182462 co-relation queries the response was YES. [2024-06-28 02:23:19,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23999 conditions, 4104 events. 2341/4104 cut-off events. For 182460/182462 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27497 event pairs, 879 based on Foata normal form. 6/4108 useless extension candidates. Maximal degree in co-relation 23915. Up to 3630 conditions per place. [2024-06-28 02:23:19,678 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 154 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-28 02:23:19,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 184 transitions, 2300 flow [2024-06-28 02:23:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-28 02:23:19,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854700854700855 [2024-06-28 02:23:19,679 INFO L175 Difference]: Start difference. First operand has 170 places, 162 transitions, 1826 flow. Second operand 6 states and 137 transitions. [2024-06-28 02:23:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 184 transitions, 2300 flow [2024-06-28 02:23:19,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 184 transitions, 2252 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:19,977 INFO L231 Difference]: Finished difference. Result has 172 places, 166 transitions, 1896 flow [2024-06-28 02:23:19,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1896, PETRI_PLACES=172, PETRI_TRANSITIONS=166} [2024-06-28 02:23:19,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-28 02:23:19,978 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 166 transitions, 1896 flow [2024-06-28 02:23:19,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:19,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:19,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:19,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:23:19,978 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)] === [2024-06-28 02:23:19,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1820691490, now seen corresponding path program 1 times [2024-06-28 02:23:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:19,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305147025] [2024-06-28 02:23:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:20,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:20,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305147025] [2024-06-28 02:23:20,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305147025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:20,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:20,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:20,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560759496] [2024-06-28 02:23:20,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:20,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:20,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:20,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:20,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 166 transitions, 1896 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:20,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:20,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:20,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:20,527 INFO L124 PetriNetUnfolderBase]: 2338/4101 cut-off events. [2024-06-28 02:23:20,527 INFO L125 PetriNetUnfolderBase]: For 185060/185072 co-relation queries the response was YES. [2024-06-28 02:23:20,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24234 conditions, 4101 events. 2338/4101 cut-off events. For 185060/185072 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27496 event pairs, 903 based on Foata normal form. 13/4108 useless extension candidates. Maximal degree in co-relation 24148. Up to 3663 conditions per place. [2024-06-28 02:23:20,561 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 142 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-28 02:23:20,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2378 flow [2024-06-28 02:23:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 02:23:20,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-28 02:23:20,562 INFO L175 Difference]: Start difference. First operand has 172 places, 166 transitions, 1896 flow. Second operand 6 states and 141 transitions. [2024-06-28 02:23:20,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2378 flow [2024-06-28 02:23:20,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 183 transitions, 2321 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:20,944 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1913 flow [2024-06-28 02:23:20,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2024-06-28 02:23:20,944 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-28 02:23:20,944 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1913 flow [2024-06-28 02:23:20,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:20,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:20,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:20,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:23:20,945 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)] === [2024-06-28 02:23:20,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2122860070, now seen corresponding path program 2 times [2024-06-28 02:23:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:20,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108280932] [2024-06-28 02:23:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:21,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:21,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108280932] [2024-06-28 02:23:21,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108280932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:21,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:21,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:21,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427949383] [2024-06-28 02:23:21,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:21,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:21,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:21,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:21,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1913 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:21,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:21,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:21,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:21,469 INFO L124 PetriNetUnfolderBase]: 2335/4100 cut-off events. [2024-06-28 02:23:21,469 INFO L125 PetriNetUnfolderBase]: For 190938/190946 co-relation queries the response was YES. [2024-06-28 02:23:21,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 4100 events. 2335/4100 cut-off events. For 190938/190946 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27491 event pairs, 912 based on Foata normal form. 9/4107 useless extension candidates. Maximal degree in co-relation 24168. Up to 3660 conditions per place. [2024-06-28 02:23:21,502 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 37 changer transitions 0/176 dead transitions. [2024-06-28 02:23:21,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 176 transitions, 2275 flow [2024-06-28 02:23:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-28 02:23:21,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 02:23:21,503 INFO L175 Difference]: Start difference. First operand has 175 places, 166 transitions, 1913 flow. Second operand 6 states and 135 transitions. [2024-06-28 02:23:21,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 176 transitions, 2275 flow [2024-06-28 02:23:21,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 2175 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:21,932 INFO L231 Difference]: Finished difference. Result has 176 places, 166 transitions, 1893 flow [2024-06-28 02:23:21,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1893, PETRI_PLACES=176, PETRI_TRANSITIONS=166} [2024-06-28 02:23:21,933 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-28 02:23:21,933 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 166 transitions, 1893 flow [2024-06-28 02:23:21,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:21,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:21,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:21,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:23:21,933 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)] === [2024-06-28 02:23:21,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:21,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1008470580, now seen corresponding path program 6 times [2024-06-28 02:23:21,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:21,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574242728] [2024-06-28 02:23:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:21,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:22,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574242728] [2024-06-28 02:23:22,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574242728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:22,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353408644] [2024-06-28 02:23:22,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:22,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:22,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:22,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 166 transitions, 1893 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:22,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:22,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:22,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:22,596 INFO L124 PetriNetUnfolderBase]: 2337/4108 cut-off events. [2024-06-28 02:23:22,596 INFO L125 PetriNetUnfolderBase]: For 198591/198599 co-relation queries the response was YES. [2024-06-28 02:23:22,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24378 conditions, 4108 events. 2337/4108 cut-off events. For 198591/198599 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27608 event pairs, 914 based on Foata normal form. 10/4116 useless extension candidates. Maximal degree in co-relation 24290. Up to 3571 conditions per place. [2024-06-28 02:23:22,635 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 106 selfloop transitions, 76 changer transitions 0/189 dead transitions. [2024-06-28 02:23:22,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 189 transitions, 2518 flow [2024-06-28 02:23:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:23:22,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-28 02:23:22,636 INFO L175 Difference]: Start difference. First operand has 176 places, 166 transitions, 1893 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:23:22,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 189 transitions, 2518 flow [2024-06-28 02:23:23,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 189 transitions, 2409 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:23,027 INFO L231 Difference]: Finished difference. Result has 178 places, 169 transitions, 1976 flow [2024-06-28 02:23:23,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1976, PETRI_PLACES=178, PETRI_TRANSITIONS=169} [2024-06-28 02:23:23,028 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-28 02:23:23,028 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 169 transitions, 1976 flow [2024-06-28 02:23:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:23,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:23,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:23,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:23:23,029 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)] === [2024-06-28 02:23:23,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash -763521838, now seen corresponding path program 7 times [2024-06-28 02:23:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349787637] [2024-06-28 02:23:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:23,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349787637] [2024-06-28 02:23:23,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349787637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:23,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:23,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:23,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579097009] [2024-06-28 02:23:23,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:23,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:23,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:23,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:23,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 169 transitions, 1976 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:23,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:23,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:23,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:23,573 INFO L124 PetriNetUnfolderBase]: 2334/4100 cut-off events. [2024-06-28 02:23:23,574 INFO L125 PetriNetUnfolderBase]: For 204807/204809 co-relation queries the response was YES. [2024-06-28 02:23:23,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24532 conditions, 4100 events. 2334/4100 cut-off events. For 204807/204809 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27513 event pairs, 946 based on Foata normal form. 1/4098 useless extension candidates. Maximal degree in co-relation 24444. Up to 3530 conditions per place. [2024-06-28 02:23:23,608 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 98 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-28 02:23:23,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 188 transitions, 2636 flow [2024-06-28 02:23:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 02:23:23,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-28 02:23:23,609 INFO L175 Difference]: Start difference. First operand has 178 places, 169 transitions, 1976 flow. Second operand 7 states and 160 transitions. [2024-06-28 02:23:23,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 188 transitions, 2636 flow [2024-06-28 02:23:24,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 188 transitions, 2462 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:24,059 INFO L231 Difference]: Finished difference. Result has 180 places, 175 transitions, 2102 flow [2024-06-28 02:23:24,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=180, PETRI_TRANSITIONS=175} [2024-06-28 02:23:24,059 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-28 02:23:24,059 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 175 transitions, 2102 flow [2024-06-28 02:23:24,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:24,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:24,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:24,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:23:24,060 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)] === [2024-06-28 02:23:24,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash -763524814, now seen corresponding path program 4 times [2024-06-28 02:23:24,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:24,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554494811] [2024-06-28 02:23:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:24,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554494811] [2024-06-28 02:23:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554494811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:24,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:24,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905408278] [2024-06-28 02:23:24,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:24,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:24,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 175 transitions, 2102 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:24,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:24,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:24,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:24,621 INFO L124 PetriNetUnfolderBase]: 2349/4126 cut-off events. [2024-06-28 02:23:24,621 INFO L125 PetriNetUnfolderBase]: For 221806/221808 co-relation queries the response was YES. [2024-06-28 02:23:24,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25603 conditions, 4126 events. 2349/4126 cut-off events. For 221806/221808 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27717 event pairs, 897 based on Foata normal form. 8/4132 useless extension candidates. Maximal degree in co-relation 25513. Up to 3708 conditions per place. [2024-06-28 02:23:24,720 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 161 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-06-28 02:23:24,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 192 transitions, 2549 flow [2024-06-28 02:23:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 02:23:24,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-28 02:23:24,721 INFO L175 Difference]: Start difference. First operand has 180 places, 175 transitions, 2102 flow. Second operand 7 states and 152 transitions. [2024-06-28 02:23:24,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 192 transitions, 2549 flow [2024-06-28 02:23:25,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 192 transitions, 2444 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:25,171 INFO L231 Difference]: Finished difference. Result has 184 places, 176 transitions, 2068 flow [2024-06-28 02:23:25,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2068, PETRI_PLACES=184, PETRI_TRANSITIONS=176} [2024-06-28 02:23:25,172 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-28 02:23:25,172 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 176 transitions, 2068 flow [2024-06-28 02:23:25,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:25,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:25,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:25,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:23:25,172 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)] === [2024-06-28 02:23:25,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash -763155852, now seen corresponding path program 2 times [2024-06-28 02:23:25,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:25,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105090111] [2024-06-28 02:23:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:25,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:25,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105090111] [2024-06-28 02:23:25,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105090111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:25,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:25,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16674701] [2024-06-28 02:23:25,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:25,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:25,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:25,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 176 transitions, 2068 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:25,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:25,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:25,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:25,722 INFO L124 PetriNetUnfolderBase]: 2369/4162 cut-off events. [2024-06-28 02:23:25,722 INFO L125 PetriNetUnfolderBase]: For 228748/228750 co-relation queries the response was YES. [2024-06-28 02:23:25,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25996 conditions, 4162 events. 2369/4162 cut-off events. For 228748/228750 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27983 event pairs, 897 based on Foata normal form. 6/4166 useless extension candidates. Maximal degree in co-relation 25903. Up to 3710 conditions per place. [2024-06-28 02:23:25,759 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 165 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-28 02:23:25,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 198 transitions, 2571 flow [2024-06-28 02:23:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 02:23:25,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-28 02:23:25,760 INFO L175 Difference]: Start difference. First operand has 184 places, 176 transitions, 2068 flow. Second operand 7 states and 155 transitions. [2024-06-28 02:23:25,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 198 transitions, 2571 flow [2024-06-28 02:23:26,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 198 transitions, 2512 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:26,294 INFO L231 Difference]: Finished difference. Result has 187 places, 179 transitions, 2119 flow [2024-06-28 02:23:26,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=187, PETRI_TRANSITIONS=179} [2024-06-28 02:23:26,294 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-28 02:23:26,294 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 179 transitions, 2119 flow [2024-06-28 02:23:26,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:26,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:26,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:26,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:23:26,295 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)] === [2024-06-28 02:23:26,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash -349848972, now seen corresponding path program 3 times [2024-06-28 02:23:26,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:26,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920357379] [2024-06-28 02:23:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:26,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:26,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920357379] [2024-06-28 02:23:26,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920357379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:26,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:26,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129769908] [2024-06-28 02:23:26,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:26,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:26,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:26,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 179 transitions, 2119 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:26,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:26,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:26,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:26,878 INFO L124 PetriNetUnfolderBase]: 2356/4143 cut-off events. [2024-06-28 02:23:26,878 INFO L125 PetriNetUnfolderBase]: For 229711/229713 co-relation queries the response was YES. [2024-06-28 02:23:26,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25753 conditions, 4143 events. 2356/4143 cut-off events. For 229711/229713 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27876 event pairs, 876 based on Foata normal form. 6/4147 useless extension candidates. Maximal degree in co-relation 25658. Up to 3559 conditions per place. [2024-06-28 02:23:26,915 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 162 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-28 02:23:26,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 201 transitions, 2613 flow [2024-06-28 02:23:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 02:23:26,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-28 02:23:26,916 INFO L175 Difference]: Start difference. First operand has 187 places, 179 transitions, 2119 flow. Second operand 7 states and 155 transitions. [2024-06-28 02:23:26,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 201 transitions, 2613 flow [2024-06-28 02:23:27,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 201 transitions, 2557 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:27,395 INFO L231 Difference]: Finished difference. Result has 192 places, 181 transitions, 2163 flow [2024-06-28 02:23:27,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2163, PETRI_PLACES=192, PETRI_TRANSITIONS=181} [2024-06-28 02:23:27,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-28 02:23:27,395 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 181 transitions, 2163 flow [2024-06-28 02:23:27,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:27,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:27,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:27,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:23:27,396 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)] === [2024-06-28 02:23:27,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash 403097560, now seen corresponding path program 1 times [2024-06-28 02:23:27,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:27,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115819747] [2024-06-28 02:23:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:27,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:27,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115819747] [2024-06-28 02:23:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115819747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:27,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:27,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767173535] [2024-06-28 02:23:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:27,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:27,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:27,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 181 transitions, 2163 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:27,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:27,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:27,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:27,978 INFO L124 PetriNetUnfolderBase]: 2363/4152 cut-off events. [2024-06-28 02:23:27,978 INFO L125 PetriNetUnfolderBase]: For 235489/235489 co-relation queries the response was YES. [2024-06-28 02:23:28,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25922 conditions, 4152 events. 2363/4152 cut-off events. For 235489/235489 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27904 event pairs, 844 based on Foata normal form. 6/4153 useless extension candidates. Maximal degree in co-relation 25824. Up to 3658 conditions per place. [2024-06-28 02:23:28,013 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 183 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-28 02:23:28,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 205 transitions, 2772 flow [2024-06-28 02:23:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:23:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:23:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-28 02:23:28,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2024-06-28 02:23:28,014 INFO L175 Difference]: Start difference. First operand has 192 places, 181 transitions, 2163 flow. Second operand 5 states and 122 transitions. [2024-06-28 02:23:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 205 transitions, 2772 flow [2024-06-28 02:23:28,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 205 transitions, 2609 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:28,539 INFO L231 Difference]: Finished difference. Result has 190 places, 182 transitions, 2053 flow [2024-06-28 02:23:28,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2053, PETRI_PLACES=190, PETRI_TRANSITIONS=182} [2024-06-28 02:23:28,540 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-28 02:23:28,540 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 182 transitions, 2053 flow [2024-06-28 02:23:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:28,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:28,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:28,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:23:28,540 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)] === [2024-06-28 02:23:28,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2083999152, now seen corresponding path program 1 times [2024-06-28 02:23:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819090317] [2024-06-28 02:23:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:28,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:28,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819090317] [2024-06-28 02:23:28,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819090317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:28,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:28,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:23:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927679851] [2024-06-28 02:23:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:23:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:23:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:23:28,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:28,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 182 transitions, 2053 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:28,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:28,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:28,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:29,077 INFO L124 PetriNetUnfolderBase]: 2350/4133 cut-off events. [2024-06-28 02:23:29,077 INFO L125 PetriNetUnfolderBase]: For 235066/235066 co-relation queries the response was YES. [2024-06-28 02:23:29,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25283 conditions, 4133 events. 2350/4133 cut-off events. For 235066/235066 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27784 event pairs, 837 based on Foata normal form. 6/4134 useless extension candidates. Maximal degree in co-relation 25187. Up to 3652 conditions per place. [2024-06-28 02:23:29,115 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 182 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-06-28 02:23:29,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 204 transitions, 2537 flow [2024-06-28 02:23:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:23:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:23:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:23:29,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-28 02:23:29,116 INFO L175 Difference]: Start difference. First operand has 190 places, 182 transitions, 2053 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:23:29,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 204 transitions, 2537 flow [2024-06-28 02:23:29,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 204 transitions, 2510 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 02:23:29,579 INFO L231 Difference]: Finished difference. Result has 193 places, 182 transitions, 2060 flow [2024-06-28 02:23:29,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2060, PETRI_PLACES=193, PETRI_TRANSITIONS=182} [2024-06-28 02:23:29,580 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2024-06-28 02:23:29,580 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 182 transitions, 2060 flow [2024-06-28 02:23:29,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:29,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:29,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:29,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:23:29,580 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)] === [2024-06-28 02:23:29,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1889924458, now seen corresponding path program 1 times [2024-06-28 02:23:29,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:29,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002979066] [2024-06-28 02:23:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:29,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:29,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002979066] [2024-06-28 02:23:29,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002979066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:29,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:29,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:29,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076090074] [2024-06-28 02:23:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:29,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:29,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:29,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:29,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 182 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:29,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:29,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:29,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:30,217 INFO L124 PetriNetUnfolderBase]: 2355/4146 cut-off events. [2024-06-28 02:23:30,217 INFO L125 PetriNetUnfolderBase]: For 228684/228696 co-relation queries the response was YES. [2024-06-28 02:23:30,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 4146 events. 2355/4146 cut-off events. For 228684/228696 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27892 event pairs, 907 based on Foata normal form. 13/4153 useless extension candidates. Maximal degree in co-relation 25238. Up to 3605 conditions per place. [2024-06-28 02:23:30,255 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 138 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-28 02:23:30,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 220 transitions, 2810 flow [2024-06-28 02:23:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:23:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:23:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-28 02:23:30,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578088578088578 [2024-06-28 02:23:30,256 INFO L175 Difference]: Start difference. First operand has 193 places, 182 transitions, 2060 flow. Second operand 11 states and 248 transitions. [2024-06-28 02:23:30,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 220 transitions, 2810 flow [2024-06-28 02:23:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 220 transitions, 2769 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:30,770 INFO L231 Difference]: Finished difference. Result has 200 places, 185 transitions, 2205 flow [2024-06-28 02:23:30,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2205, PETRI_PLACES=200, PETRI_TRANSITIONS=185} [2024-06-28 02:23:30,771 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-28 02:23:30,771 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 185 transitions, 2205 flow [2024-06-28 02:23:30,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:30,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:30,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:30,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:23:30,772 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)] === [2024-06-28 02:23:30,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash 864018936, now seen corresponding path program 2 times [2024-06-28 02:23:30,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:30,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678014773] [2024-06-28 02:23:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678014773] [2024-06-28 02:23:30,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678014773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:30,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:30,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:30,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786237409] [2024-06-28 02:23:30,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:30,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:30,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 185 transitions, 2205 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:30,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:30,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:31,414 INFO L124 PetriNetUnfolderBase]: 2352/4142 cut-off events. [2024-06-28 02:23:31,414 INFO L125 PetriNetUnfolderBase]: For 235583/235595 co-relation queries the response was YES. [2024-06-28 02:23:31,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4142 events. 2352/4142 cut-off events. For 235583/235595 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27879 event pairs, 907 based on Foata normal form. 13/4149 useless extension candidates. Maximal degree in co-relation 25430. Up to 3602 conditions per place. [2024-06-28 02:23:31,453 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 75 changer transitions 0/219 dead transitions. [2024-06-28 02:23:31,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 219 transitions, 2819 flow [2024-06-28 02:23:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:23:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:23:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-28 02:23:31,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-28 02:23:31,454 INFO L175 Difference]: Start difference. First operand has 200 places, 185 transitions, 2205 flow. Second operand 11 states and 247 transitions. [2024-06-28 02:23:31,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 219 transitions, 2819 flow [2024-06-28 02:23:31,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 219 transitions, 2623 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:31,991 INFO L231 Difference]: Finished difference. Result has 202 places, 185 transitions, 2167 flow [2024-06-28 02:23:31,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2167, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2024-06-28 02:23:31,992 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-28 02:23:31,992 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 2167 flow [2024-06-28 02:23:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:31,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:31,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:31,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:23:31,992 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)] === [2024-06-28 02:23:31,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1384157238, now seen corresponding path program 3 times [2024-06-28 02:23:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:31,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740547452] [2024-06-28 02:23:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:31,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740547452] [2024-06-28 02:23:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740547452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:32,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:32,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:32,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620402278] [2024-06-28 02:23:32,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:32,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:32,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:32,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 2167 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:32,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:32,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:32,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:32,625 INFO L124 PetriNetUnfolderBase]: 2357/4155 cut-off events. [2024-06-28 02:23:32,625 INFO L125 PetriNetUnfolderBase]: For 235587/235595 co-relation queries the response was YES. [2024-06-28 02:23:32,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25549 conditions, 4155 events. 2357/4155 cut-off events. For 235587/235595 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28018 event pairs, 910 based on Foata normal form. 9/4162 useless extension candidates. Maximal degree in co-relation 25450. Up to 3608 conditions per place. [2024-06-28 02:23:32,664 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 121 selfloop transitions, 82 changer transitions 0/210 dead transitions. [2024-06-28 02:23:32,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 210 transitions, 2766 flow [2024-06-28 02:23:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:23:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:23:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-28 02:23:32,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2024-06-28 02:23:32,665 INFO L175 Difference]: Start difference. First operand has 202 places, 185 transitions, 2167 flow. Second operand 11 states and 237 transitions. [2024-06-28 02:23:32,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 210 transitions, 2766 flow [2024-06-28 02:23:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 210 transitions, 2606 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:23:33,184 INFO L231 Difference]: Finished difference. Result has 203 places, 188 transitions, 2214 flow [2024-06-28 02:23:33,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2214, PETRI_PLACES=203, PETRI_TRANSITIONS=188} [2024-06-28 02:23:33,185 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 163 predicate places. [2024-06-28 02:23:33,185 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 188 transitions, 2214 flow [2024-06-28 02:23:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:33,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:33,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:33,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:23:33,186 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)] === [2024-06-28 02:23:33,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash 489989300, now seen corresponding path program 4 times [2024-06-28 02:23:33,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:33,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100911116] [2024-06-28 02:23:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:33,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:33,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:33,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100911116] [2024-06-28 02:23:33,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100911116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:33,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:33,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273205134] [2024-06-28 02:23:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:33,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:33,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 188 transitions, 2214 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:33,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:33,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:33,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:33,805 INFO L124 PetriNetUnfolderBase]: 2354/4151 cut-off events. [2024-06-28 02:23:33,805 INFO L125 PetriNetUnfolderBase]: For 234225/234233 co-relation queries the response was YES. [2024-06-28 02:23:33,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25477 conditions, 4151 events. 2354/4151 cut-off events. For 234225/234233 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27975 event pairs, 910 based on Foata normal form. 9/4158 useless extension candidates. Maximal degree in co-relation 25377. Up to 3605 conditions per place. [2024-06-28 02:23:33,844 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 82 changer transitions 0/209 dead transitions. [2024-06-28 02:23:33,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 209 transitions, 2668 flow [2024-06-28 02:23:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:23:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:23:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-28 02:23:33,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501165501165501 [2024-06-28 02:23:33,845 INFO L175 Difference]: Start difference. First operand has 203 places, 188 transitions, 2214 flow. Second operand 11 states and 236 transitions. [2024-06-28 02:23:33,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 209 transitions, 2668 flow [2024-06-28 02:23:34,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 209 transitions, 2480 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:34,483 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2196 flow [2024-06-28 02:23:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2196, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-28 02:23:34,483 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-28 02:23:34,483 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2196 flow [2024-06-28 02:23:34,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:23:34,484 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)] === [2024-06-28 02:23:34,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2100628056, now seen corresponding path program 5 times [2024-06-28 02:23:34,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27765751] [2024-06-28 02:23:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:34,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:34,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27765751] [2024-06-28 02:23:34,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27765751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:34,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:34,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417928806] [2024-06-28 02:23:34,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:34,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:34,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:34,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:34,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:34,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2196 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:34,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:34,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:34,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:35,069 INFO L124 PetriNetUnfolderBase]: 2351/4144 cut-off events. [2024-06-28 02:23:35,070 INFO L125 PetriNetUnfolderBase]: For 240921/240923 co-relation queries the response was YES. [2024-06-28 02:23:35,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4144 events. 2351/4144 cut-off events. For 240921/240923 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27945 event pairs, 941 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 25427. Up to 3565 conditions per place. [2024-06-28 02:23:35,108 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 105 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-28 02:23:35,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 202 transitions, 2618 flow [2024-06-28 02:23:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-28 02:23:35,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541025641025641 [2024-06-28 02:23:35,109 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2196 flow. Second operand 10 states and 211 transitions. [2024-06-28 02:23:35,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 202 transitions, 2618 flow [2024-06-28 02:23:35,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 202 transitions, 2454 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 02:23:35,839 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2218 flow [2024-06-28 02:23:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2218, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-28 02:23:35,840 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-28 02:23:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2218 flow [2024-06-28 02:23:35,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:35,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:35,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:35,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:23:35,840 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)] === [2024-06-28 02:23:35,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1197821225, now seen corresponding path program 1 times [2024-06-28 02:23:35,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:35,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540904273] [2024-06-28 02:23:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:35,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:35,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540904273] [2024-06-28 02:23:35,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540904273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:35,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:35,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:35,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385519546] [2024-06-28 02:23:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:35,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:35,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2218 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:35,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:35,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:36,514 INFO L124 PetriNetUnfolderBase]: 2338/4121 cut-off events. [2024-06-28 02:23:36,515 INFO L125 PetriNetUnfolderBase]: For 256659/256671 co-relation queries the response was YES. [2024-06-28 02:23:36,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24696 conditions, 4121 events. 2338/4121 cut-off events. For 256659/256671 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27589 event pairs, 731 based on Foata normal form. 36/4156 useless extension candidates. Maximal degree in co-relation 24594. Up to 1560 conditions per place. [2024-06-28 02:23:36,553 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 161 selfloop transitions, 57 changer transitions 14/239 dead transitions. [2024-06-28 02:23:36,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 239 transitions, 3112 flow [2024-06-28 02:23:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-28 02:23:36,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-28 02:23:36,554 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2218 flow. Second operand 9 states and 224 transitions. [2024-06-28 02:23:36,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 239 transitions, 3112 flow [2024-06-28 02:23:37,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 239 transitions, 2869 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:37,110 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2056 flow [2024-06-28 02:23:37,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-28 02:23:37,111 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-28 02:23:37,111 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2056 flow [2024-06-28 02:23:37,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:37,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:37,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:23:37,112 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)] === [2024-06-28 02:23:37,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1442184741, now seen corresponding path program 2 times [2024-06-28 02:23:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:37,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757587025] [2024-06-28 02:23:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757587025] [2024-06-28 02:23:37,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757587025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:37,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:37,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774714252] [2024-06-28 02:23:37,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:37,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:37,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:37,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2056 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:37,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:37,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:37,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:37,864 INFO L124 PetriNetUnfolderBase]: 2516/4353 cut-off events. [2024-06-28 02:23:37,865 INFO L125 PetriNetUnfolderBase]: For 333121/333133 co-relation queries the response was YES. [2024-06-28 02:23:37,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29230 conditions, 4353 events. 2516/4353 cut-off events. For 333121/333133 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29006 event pairs, 785 based on Foata normal form. 18/4370 useless extension candidates. Maximal degree in co-relation 29128. Up to 1768 conditions per place. [2024-06-28 02:23:37,908 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 152 selfloop transitions, 62 changer transitions 11/232 dead transitions. [2024-06-28 02:23:37,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 232 transitions, 2948 flow [2024-06-28 02:23:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-28 02:23:37,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-28 02:23:37,910 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2056 flow. Second operand 9 states and 219 transitions. [2024-06-28 02:23:37,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 232 transitions, 2948 flow [2024-06-28 02:23:38,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 232 transitions, 2817 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:38,393 INFO L231 Difference]: Finished difference. Result has 205 places, 183 transitions, 2066 flow [2024-06-28 02:23:38,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2066, PETRI_PLACES=205, PETRI_TRANSITIONS=183} [2024-06-28 02:23:38,394 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-28 02:23:38,394 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 183 transitions, 2066 flow [2024-06-28 02:23:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:38,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:38,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:23:38,395 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)] === [2024-06-28 02:23:38,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1389806211, now seen corresponding path program 3 times [2024-06-28 02:23:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:38,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633511790] [2024-06-28 02:23:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:38,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633511790] [2024-06-28 02:23:38,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633511790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:38,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:38,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:38,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995461096] [2024-06-28 02:23:38,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:38,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:38,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:38,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 183 transitions, 2066 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:38,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:38,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:38,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:39,086 INFO L124 PetriNetUnfolderBase]: 2399/4179 cut-off events. [2024-06-28 02:23:39,086 INFO L125 PetriNetUnfolderBase]: For 312938/312950 co-relation queries the response was YES. [2024-06-28 02:23:39,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26723 conditions, 4179 events. 2399/4179 cut-off events. For 312938/312950 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28008 event pairs, 870 based on Foata normal form. 42/4220 useless extension candidates. Maximal degree in co-relation 26621. Up to 2889 conditions per place. [2024-06-28 02:23:39,125 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 150 selfloop transitions, 53 changer transitions 18/228 dead transitions. [2024-06-28 02:23:39,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 228 transitions, 2784 flow [2024-06-28 02:23:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-28 02:23:39,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-28 02:23:39,126 INFO L175 Difference]: Start difference. First operand has 205 places, 183 transitions, 2066 flow. Second operand 10 states and 237 transitions. [2024-06-28 02:23:39,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 228 transitions, 2784 flow [2024-06-28 02:23:39,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 228 transitions, 2653 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:39,802 INFO L231 Difference]: Finished difference. Result has 203 places, 175 transitions, 1958 flow [2024-06-28 02:23:39,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1958, PETRI_PLACES=203, PETRI_TRANSITIONS=175} [2024-06-28 02:23:39,802 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 163 predicate places. [2024-06-28 02:23:39,802 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 175 transitions, 1958 flow [2024-06-28 02:23:39,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:39,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:39,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:39,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:23:39,803 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)] === [2024-06-28 02:23:39,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1306210779, now seen corresponding path program 4 times [2024-06-28 02:23:39,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:39,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571201542] [2024-06-28 02:23:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:39,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:39,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571201542] [2024-06-28 02:23:39,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571201542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:39,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:39,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469455345] [2024-06-28 02:23:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:39,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:39,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:39,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 175 transitions, 1958 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:39,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:39,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:39,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:40,388 INFO L124 PetriNetUnfolderBase]: 2157/3760 cut-off events. [2024-06-28 02:23:40,388 INFO L125 PetriNetUnfolderBase]: For 268674/268686 co-relation queries the response was YES. [2024-06-28 02:23:40,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23535 conditions, 3760 events. 2157/3760 cut-off events. For 268674/268686 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24755 event pairs, 804 based on Foata normal form. 46/3805 useless extension candidates. Maximal degree in co-relation 23435. Up to 3145 conditions per place. [2024-06-28 02:23:40,422 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 47 changer transitions 23/211 dead transitions. [2024-06-28 02:23:40,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 211 transitions, 2496 flow [2024-06-28 02:23:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-28 02:23:40,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-28 02:23:40,423 INFO L175 Difference]: Start difference. First operand has 203 places, 175 transitions, 1958 flow. Second operand 10 states and 226 transitions. [2024-06-28 02:23:40,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 211 transitions, 2496 flow [2024-06-28 02:23:40,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 211 transitions, 2383 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 02:23:40,984 INFO L231 Difference]: Finished difference. Result has 200 places, 168 transitions, 1876 flow [2024-06-28 02:23:40,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1876, PETRI_PLACES=200, PETRI_TRANSITIONS=168} [2024-06-28 02:23:40,985 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-28 02:23:40,985 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 168 transitions, 1876 flow [2024-06-28 02:23:40,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:40,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:40,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:40,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:23:40,986 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)] === [2024-06-28 02:23:40,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1792646693, now seen corresponding path program 5 times [2024-06-28 02:23:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:40,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474183231] [2024-06-28 02:23:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:41,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474183231] [2024-06-28 02:23:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474183231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:41,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:41,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:41,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686114418] [2024-06-28 02:23:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:41,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:41,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:41,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:41,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 168 transitions, 1876 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:41,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:41,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:41,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:41,588 INFO L124 PetriNetUnfolderBase]: 2061/3589 cut-off events. [2024-06-28 02:23:41,588 INFO L125 PetriNetUnfolderBase]: For 213872/213883 co-relation queries the response was YES. [2024-06-28 02:23:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22505 conditions, 3589 events. 2061/3589 cut-off events. For 213872/213883 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23362 event pairs, 768 based on Foata normal form. 19/3607 useless extension candidates. Maximal degree in co-relation 22407. Up to 3141 conditions per place. [2024-06-28 02:23:41,615 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 133 selfloop transitions, 45 changer transitions 10/195 dead transitions. [2024-06-28 02:23:41,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 195 transitions, 2348 flow [2024-06-28 02:23:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-28 02:23:41,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-28 02:23:41,616 INFO L175 Difference]: Start difference. First operand has 200 places, 168 transitions, 1876 flow. Second operand 9 states and 200 transitions. [2024-06-28 02:23:41,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 195 transitions, 2348 flow [2024-06-28 02:23:41,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 195 transitions, 2242 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-28 02:23:41,995 INFO L231 Difference]: Finished difference. Result has 193 places, 165 transitions, 1832 flow [2024-06-28 02:23:41,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1832, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2024-06-28 02:23:41,995 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2024-06-28 02:23:41,996 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 1832 flow [2024-06-28 02:23:41,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:41,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:41,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:23:41,996 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)] === [2024-06-28 02:23:41,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1795503653, now seen corresponding path program 6 times [2024-06-28 02:23:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:41,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253471664] [2024-06-28 02:23:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:42,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:42,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253471664] [2024-06-28 02:23:42,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253471664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:42,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:42,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195497008] [2024-06-28 02:23:42,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:42,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:42,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:42,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:42,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 1832 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:42,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:42,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:42,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:42,564 INFO L124 PetriNetUnfolderBase]: 2229/3856 cut-off events. [2024-06-28 02:23:42,564 INFO L125 PetriNetUnfolderBase]: For 233805/233816 co-relation queries the response was YES. [2024-06-28 02:23:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24821 conditions, 3856 events. 2229/3856 cut-off events. For 233805/233816 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25361 event pairs, 840 based on Foata normal form. 19/3874 useless extension candidates. Maximal degree in co-relation 24726. Up to 3107 conditions per place. [2024-06-28 02:23:42,597 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 42 changer transitions 14/200 dead transitions. [2024-06-28 02:23:42,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 200 transitions, 2470 flow [2024-06-28 02:23:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-28 02:23:42,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-28 02:23:42,599 INFO L175 Difference]: Start difference. First operand has 193 places, 165 transitions, 1832 flow. Second operand 9 states and 206 transitions. [2024-06-28 02:23:42,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 200 transitions, 2470 flow [2024-06-28 02:23:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 200 transitions, 2370 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:43,046 INFO L231 Difference]: Finished difference. Result has 192 places, 161 transitions, 1770 flow [2024-06-28 02:23:43,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=192, PETRI_TRANSITIONS=161} [2024-06-28 02:23:43,046 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-28 02:23:43,046 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 161 transitions, 1770 flow [2024-06-28 02:23:43,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:43,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:43,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:43,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:23:43,047 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)] === [2024-06-28 02:23:43,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash 56658365, now seen corresponding path program 7 times [2024-06-28 02:23:43,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:43,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857191548] [2024-06-28 02:23:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:43,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857191548] [2024-06-28 02:23:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857191548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:43,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:43,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284720220] [2024-06-28 02:23:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:43,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:43,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 161 transitions, 1770 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:43,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:43,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:43,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:43,640 INFO L124 PetriNetUnfolderBase]: 2102/3652 cut-off events. [2024-06-28 02:23:43,640 INFO L125 PetriNetUnfolderBase]: For 215590/215604 co-relation queries the response was YES. [2024-06-28 02:23:43,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22340 conditions, 3652 events. 2102/3652 cut-off events. For 215590/215604 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24048 event pairs, 686 based on Foata normal form. 34/3685 useless extension candidates. Maximal degree in co-relation 22245. Up to 2035 conditions per place. [2024-06-28 02:23:43,673 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 131 selfloop transitions, 32 changer transitions 21/191 dead transitions. [2024-06-28 02:23:43,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 191 transitions, 2362 flow [2024-06-28 02:23:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:23:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-28 02:23:43,674 INFO L175 Difference]: Start difference. First operand has 192 places, 161 transitions, 1770 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:23:43,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 191 transitions, 2362 flow [2024-06-28 02:23:43,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 191 transitions, 2256 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:43,911 INFO L231 Difference]: Finished difference. Result has 187 places, 150 transitions, 1606 flow [2024-06-28 02:23:43,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1606, PETRI_PLACES=187, PETRI_TRANSITIONS=150} [2024-06-28 02:23:43,912 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-28 02:23:43,912 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 150 transitions, 1606 flow [2024-06-28 02:23:43,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:43,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:43,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:23:43,912 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)] === [2024-06-28 02:23:43,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash 234153143, now seen corresponding path program 1 times [2024-06-28 02:23:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:43,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638040278] [2024-06-28 02:23:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:43,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638040278] [2024-06-28 02:23:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638040278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:43,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88965186] [2024-06-28 02:23:43,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:44,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:44,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 150 transitions, 1606 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:44,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:44,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:44,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:44,362 INFO L124 PetriNetUnfolderBase]: 1868/3254 cut-off events. [2024-06-28 02:23:44,362 INFO L125 PetriNetUnfolderBase]: For 186164/186168 co-relation queries the response was YES. [2024-06-28 02:23:44,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20834 conditions, 3254 events. 1868/3254 cut-off events. For 186164/186168 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21146 event pairs, 620 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 20740. Up to 2685 conditions per place. [2024-06-28 02:23:44,389 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-28 02:23:44,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 173 transitions, 2146 flow [2024-06-28 02:23:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 02:23:44,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 02:23:44,390 INFO L175 Difference]: Start difference. First operand has 187 places, 150 transitions, 1606 flow. Second operand 6 states and 144 transitions. [2024-06-28 02:23:44,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 173 transitions, 2146 flow [2024-06-28 02:23:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 173 transitions, 2051 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-28 02:23:44,662 INFO L231 Difference]: Finished difference. Result has 177 places, 152 transitions, 1631 flow [2024-06-28 02:23:44,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=177, PETRI_TRANSITIONS=152} [2024-06-28 02:23:44,663 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-28 02:23:44,663 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 152 transitions, 1631 flow [2024-06-28 02:23:44,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:44,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:44,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:23:44,663 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)] === [2024-06-28 02:23:44,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash 65229245, now seen corresponding path program 8 times [2024-06-28 02:23:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:44,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993413776] [2024-06-28 02:23:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:44,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:44,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993413776] [2024-06-28 02:23:44,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993413776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:44,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:44,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:44,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285771869] [2024-06-28 02:23:44,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:44,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:44,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:44,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 152 transitions, 1631 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:44,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:44,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:44,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:45,176 INFO L124 PetriNetUnfolderBase]: 1799/3139 cut-off events. [2024-06-28 02:23:45,177 INFO L125 PetriNetUnfolderBase]: For 158760/158764 co-relation queries the response was YES. [2024-06-28 02:23:45,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18522 conditions, 3139 events. 1799/3139 cut-off events. For 158760/158764 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20176 event pairs, 683 based on Foata normal form. 38/3176 useless extension candidates. Maximal degree in co-relation 18433. Up to 2613 conditions per place. [2024-06-28 02:23:45,200 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 118 selfloop transitions, 26 changer transitions 21/172 dead transitions. [2024-06-28 02:23:45,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 172 transitions, 2037 flow [2024-06-28 02:23:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-28 02:23:45,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-28 02:23:45,201 INFO L175 Difference]: Start difference. First operand has 177 places, 152 transitions, 1631 flow. Second operand 7 states and 161 transitions. [2024-06-28 02:23:45,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 172 transitions, 2037 flow [2024-06-28 02:23:45,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 172 transitions, 1987 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:45,405 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1523 flow [2024-06-28 02:23:45,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1523, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-28 02:23:45,405 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-28 02:23:45,405 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1523 flow [2024-06-28 02:23:45,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:45,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:45,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:45,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:23:45,406 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)] === [2024-06-28 02:23:45,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 352116575, now seen corresponding path program 9 times [2024-06-28 02:23:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760031800] [2024-06-28 02:23:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:45,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760031800] [2024-06-28 02:23:45,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760031800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:45,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:45,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:45,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969573061] [2024-06-28 02:23:45,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:45,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:45,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:45,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1523 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:45,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:45,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:45,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:45,873 INFO L124 PetriNetUnfolderBase]: 1578/2746 cut-off events. [2024-06-28 02:23:45,873 INFO L125 PetriNetUnfolderBase]: For 123571/123575 co-relation queries the response was YES. [2024-06-28 02:23:45,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 2746 events. 1578/2746 cut-off events. For 123571/123575 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17069 event pairs, 558 based on Foata normal form. 38/2783 useless extension candidates. Maximal degree in co-relation 15276. Up to 2250 conditions per place. [2024-06-28 02:23:45,896 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 25 changer transitions 7/159 dead transitions. [2024-06-28 02:23:45,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 159 transitions, 1895 flow [2024-06-28 02:23:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 02:23:45,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-28 02:23:45,897 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1523 flow. Second operand 7 states and 155 transitions. [2024-06-28 02:23:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 159 transitions, 1895 flow [2024-06-28 02:23:46,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 159 transitions, 1817 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-28 02:23:46,049 INFO L231 Difference]: Finished difference. Result has 170 places, 137 transitions, 1441 flow [2024-06-28 02:23:46,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=170, PETRI_TRANSITIONS=137} [2024-06-28 02:23:46,049 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-28 02:23:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 137 transitions, 1441 flow [2024-06-28 02:23:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:46,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:46,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:46,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:23:46,050 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)] === [2024-06-28 02:23:46,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1206603085, now seen corresponding path program 1 times [2024-06-28 02:23:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:46,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426387843] [2024-06-28 02:23:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:46,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426387843] [2024-06-28 02:23:46,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426387843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:46,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:46,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573394401] [2024-06-28 02:23:46,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:46,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:46,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 137 transitions, 1441 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:46,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:46,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:46,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:46,431 INFO L124 PetriNetUnfolderBase]: 1381/2415 cut-off events. [2024-06-28 02:23:46,431 INFO L125 PetriNetUnfolderBase]: For 74635/74639 co-relation queries the response was YES. [2024-06-28 02:23:46,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13388 conditions, 2415 events. 1381/2415 cut-off events. For 74635/74639 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14524 event pairs, 363 based on Foata normal form. 10/2424 useless extension candidates. Maximal degree in co-relation 13304. Up to 1906 conditions per place. [2024-06-28 02:23:46,450 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 119 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2024-06-28 02:23:46,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 157 transitions, 1817 flow [2024-06-28 02:23:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 02:23:46,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-28 02:23:46,451 INFO L175 Difference]: Start difference. First operand has 170 places, 137 transitions, 1441 flow. Second operand 6 states and 142 transitions. [2024-06-28 02:23:46,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 157 transitions, 1817 flow [2024-06-28 02:23:46,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 157 transitions, 1733 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-28 02:23:46,612 INFO L231 Difference]: Finished difference. Result has 163 places, 137 transitions, 1425 flow [2024-06-28 02:23:46,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1425, PETRI_PLACES=163, PETRI_TRANSITIONS=137} [2024-06-28 02:23:46,612 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-28 02:23:46,612 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 137 transitions, 1425 flow [2024-06-28 02:23:46,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:46,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:46,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:46,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:23:46,613 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)] === [2024-06-28 02:23:46,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash 352485537, now seen corresponding path program 1 times [2024-06-28 02:23:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:46,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642639319] [2024-06-28 02:23:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642639319] [2024-06-28 02:23:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642639319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:46,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:46,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241832524] [2024-06-28 02:23:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:46,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:46,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:46,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 137 transitions, 1425 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:46,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:46,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:46,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:47,055 INFO L124 PetriNetUnfolderBase]: 1485/2607 cut-off events. [2024-06-28 02:23:47,055 INFO L125 PetriNetUnfolderBase]: For 91222/91226 co-relation queries the response was YES. [2024-06-28 02:23:47,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 2607 events. 1485/2607 cut-off events. For 91222/91226 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16099 event pairs, 379 based on Foata normal form. 34/2640 useless extension candidates. Maximal degree in co-relation 14044. Up to 2003 conditions per place. [2024-06-28 02:23:47,074 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 32 changer transitions 5/166 dead transitions. [2024-06-28 02:23:47,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 166 transitions, 1936 flow [2024-06-28 02:23:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-28 02:23:47,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-28 02:23:47,075 INFO L175 Difference]: Start difference. First operand has 163 places, 137 transitions, 1425 flow. Second operand 8 states and 179 transitions. [2024-06-28 02:23:47,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 166 transitions, 1936 flow [2024-06-28 02:23:47,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 166 transitions, 1839 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:47,207 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1479 flow [2024-06-28 02:23:47,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-28 02:23:47,207 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-28 02:23:47,208 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1479 flow [2024-06-28 02:23:47,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:47,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:47,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:23:47,208 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)] === [2024-06-28 02:23:47,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash -964200035, now seen corresponding path program 2 times [2024-06-28 02:23:47,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:47,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404231730] [2024-06-28 02:23:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:47,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:47,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404231730] [2024-06-28 02:23:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404231730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:47,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591594205] [2024-06-28 02:23:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:47,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:47,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:47,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:47,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:47,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:47,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:47,568 INFO L124 PetriNetUnfolderBase]: 1344/2312 cut-off events. [2024-06-28 02:23:47,568 INFO L125 PetriNetUnfolderBase]: For 67314/67316 co-relation queries the response was YES. [2024-06-28 02:23:47,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2312 events. 1344/2312 cut-off events. For 67314/67316 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13521 event pairs, 415 based on Foata normal form. 10/2321 useless extension candidates. Maximal degree in co-relation 12678. Up to 1938 conditions per place. [2024-06-28 02:23:47,585 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 22 changer transitions 9/161 dead transitions. [2024-06-28 02:23:47,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 1951 flow [2024-06-28 02:23:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 02:23:47,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 02:23:47,586 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1479 flow. Second operand 8 states and 173 transitions. [2024-06-28 02:23:47,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 1951 flow [2024-06-28 02:23:47,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 161 transitions, 1866 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:47,718 INFO L231 Difference]: Finished difference. Result has 167 places, 136 transitions, 1392 flow [2024-06-28 02:23:47,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=167, PETRI_TRANSITIONS=136} [2024-06-28 02:23:47,719 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-28 02:23:47,719 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 136 transitions, 1392 flow [2024-06-28 02:23:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:47,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:47,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:23:47,719 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)] === [2024-06-28 02:23:47,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash -971818595, now seen corresponding path program 3 times [2024-06-28 02:23:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919574301] [2024-06-28 02:23:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:47,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:47,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919574301] [2024-06-28 02:23:47,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919574301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:47,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:47,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:47,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989160988] [2024-06-28 02:23:47,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:47,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:47,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:47,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:47,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 136 transitions, 1392 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:47,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:47,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:47,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:48,043 INFO L124 PetriNetUnfolderBase]: 1176/2026 cut-off events. [2024-06-28 02:23:48,043 INFO L125 PetriNetUnfolderBase]: For 59194/59196 co-relation queries the response was YES. [2024-06-28 02:23:48,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11019 conditions, 2026 events. 1176/2026 cut-off events. For 59194/59196 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11478 event pairs, 349 based on Foata normal form. 10/2035 useless extension candidates. Maximal degree in co-relation 10938. Up to 1752 conditions per place. [2024-06-28 02:23:48,058 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 18 changer transitions 12/152 dead transitions. [2024-06-28 02:23:48,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 152 transitions, 1738 flow [2024-06-28 02:23:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 02:23:48,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-28 02:23:48,059 INFO L175 Difference]: Start difference. First operand has 167 places, 136 transitions, 1392 flow. Second operand 8 states and 166 transitions. [2024-06-28 02:23:48,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 152 transitions, 1738 flow [2024-06-28 02:23:48,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 152 transitions, 1674 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-28 02:23:48,153 INFO L231 Difference]: Finished difference. Result has 159 places, 131 transitions, 1315 flow [2024-06-28 02:23:48,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=159, PETRI_TRANSITIONS=131} [2024-06-28 02:23:48,153 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-28 02:23:48,153 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 131 transitions, 1315 flow [2024-06-28 02:23:48,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:48,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:48,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:48,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:23:48,154 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)] === [2024-06-28 02:23:48,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -151962669, now seen corresponding path program 4 times [2024-06-28 02:23:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893319795] [2024-06-28 02:23:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:48,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893319795] [2024-06-28 02:23:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893319795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57586769] [2024-06-28 02:23:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:48,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:48,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 131 transitions, 1315 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:48,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:48,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:48,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:48,520 INFO L124 PetriNetUnfolderBase]: 1094/1882 cut-off events. [2024-06-28 02:23:48,520 INFO L125 PetriNetUnfolderBase]: For 52306/52308 co-relation queries the response was YES. [2024-06-28 02:23:48,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 1882 events. 1094/1882 cut-off events. For 52306/52308 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10464 event pairs, 245 based on Foata normal form. 8/1889 useless extension candidates. Maximal degree in co-relation 10274. Up to 1556 conditions per place. [2024-06-28 02:23:48,534 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 115 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-28 02:23:48,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 152 transitions, 1705 flow [2024-06-28 02:23:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 02:23:48,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 02:23:48,535 INFO L175 Difference]: Start difference. First operand has 159 places, 131 transitions, 1315 flow. Second operand 8 states and 173 transitions. [2024-06-28 02:23:48,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 152 transitions, 1705 flow [2024-06-28 02:23:48,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 152 transitions, 1624 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-28 02:23:48,601 INFO L231 Difference]: Finished difference. Result has 148 places, 132 transitions, 1332 flow [2024-06-28 02:23:48,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=148, PETRI_TRANSITIONS=132} [2024-06-28 02:23:48,601 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2024-06-28 02:23:48,601 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 132 transitions, 1332 flow [2024-06-28 02:23:48,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:48,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:48,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:48,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:23:48,602 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)] === [2024-06-28 02:23:48,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash -152082639, now seen corresponding path program 5 times [2024-06-28 02:23:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:48,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903239718] [2024-06-28 02:23:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:48,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:48,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903239718] [2024-06-28 02:23:48,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903239718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:48,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:48,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:48,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894043424] [2024-06-28 02:23:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:48,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:48,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:48,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:48,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 132 transitions, 1332 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:48,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:48,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:48,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:48,927 INFO L124 PetriNetUnfolderBase]: 1114/1914 cut-off events. [2024-06-28 02:23:48,927 INFO L125 PetriNetUnfolderBase]: For 42566/42568 co-relation queries the response was YES. [2024-06-28 02:23:48,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10046 conditions, 1914 events. 1114/1914 cut-off events. For 42566/42568 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10679 event pairs, 248 based on Foata normal form. 8/1921 useless extension candidates. Maximal degree in co-relation 9975. Up to 1508 conditions per place. [2024-06-28 02:23:48,941 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 116 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-28 02:23:48,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1730 flow [2024-06-28 02:23:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 02:23:48,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-28 02:23:48,941 INFO L175 Difference]: Start difference. First operand has 148 places, 132 transitions, 1332 flow. Second operand 8 states and 174 transitions. [2024-06-28 02:23:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1730 flow [2024-06-28 02:23:48,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 155 transitions, 1622 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:48,999 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1316 flow [2024-06-28 02:23:48,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1316, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-28 02:23:48,999 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-28 02:23:48,999 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1316 flow [2024-06-28 02:23:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:49,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:23:49,000 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)] === [2024-06-28 02:23:49,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1011934327, now seen corresponding path program 2 times [2024-06-28 02:23:49,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:49,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072352791] [2024-06-28 02:23:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:49,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:49,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:49,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072352791] [2024-06-28 02:23:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072352791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:49,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:49,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412026274] [2024-06-28 02:23:49,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:49,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:49,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:49,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:49,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1316 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:49,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:49,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:49,334 INFO L124 PetriNetUnfolderBase]: 1134/1940 cut-off events. [2024-06-28 02:23:49,335 INFO L125 PetriNetUnfolderBase]: For 44816/44818 co-relation queries the response was YES. [2024-06-28 02:23:49,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10182 conditions, 1940 events. 1134/1940 cut-off events. For 44816/44818 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10855 event pairs, 330 based on Foata normal form. 8/1937 useless extension candidates. Maximal degree in co-relation 10111. Up to 1598 conditions per place. [2024-06-28 02:23:49,348 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-28 02:23:49,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 1794 flow [2024-06-28 02:23:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-28 02:23:49,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-28 02:23:49,348 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1316 flow. Second operand 8 states and 181 transitions. [2024-06-28 02:23:49,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 1794 flow [2024-06-28 02:23:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 160 transitions, 1714 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:49,419 INFO L231 Difference]: Finished difference. Result has 151 places, 134 transitions, 1324 flow [2024-06-28 02:23:49,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=151, PETRI_TRANSITIONS=134} [2024-06-28 02:23:49,420 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-28 02:23:49,420 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 134 transitions, 1324 flow [2024-06-28 02:23:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:49,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:23:49,420 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)] === [2024-06-28 02:23:49,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563645, now seen corresponding path program 3 times [2024-06-28 02:23:49,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:49,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389638380] [2024-06-28 02:23:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:49,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389638380] [2024-06-28 02:23:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389638380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:49,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:49,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:49,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577021444] [2024-06-28 02:23:49,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:49,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:49,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:49,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:49,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 134 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:49,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:49,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:49,733 INFO L124 PetriNetUnfolderBase]: 1116/1927 cut-off events. [2024-06-28 02:23:49,733 INFO L125 PetriNetUnfolderBase]: For 42785/42787 co-relation queries the response was YES. [2024-06-28 02:23:49,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9754 conditions, 1927 events. 1116/1927 cut-off events. For 42785/42787 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10839 event pairs, 341 based on Foata normal form. 10/1931 useless extension candidates. Maximal degree in co-relation 9682. Up to 1632 conditions per place. [2024-06-28 02:23:49,745 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-28 02:23:49,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 152 transitions, 1672 flow [2024-06-28 02:23:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-28 02:23:49,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-28 02:23:49,746 INFO L175 Difference]: Start difference. First operand has 151 places, 134 transitions, 1324 flow. Second operand 7 states and 157 transitions. [2024-06-28 02:23:49,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 152 transitions, 1672 flow [2024-06-28 02:23:49,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 152 transitions, 1592 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:49,800 INFO L231 Difference]: Finished difference. Result has 153 places, 134 transitions, 1305 flow [2024-06-28 02:23:49,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=153, PETRI_TRANSITIONS=134} [2024-06-28 02:23:49,801 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-28 02:23:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 134 transitions, 1305 flow [2024-06-28 02:23:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:49,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:23:49,801 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)] === [2024-06-28 02:23:49,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash 658615415, now seen corresponding path program 4 times [2024-06-28 02:23:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:49,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198326108] [2024-06-28 02:23:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:49,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:49,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198326108] [2024-06-28 02:23:49,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198326108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:49,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:49,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:49,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365115957] [2024-06-28 02:23:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:49,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:49,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 134 transitions, 1305 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:49,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:49,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:50,173 INFO L124 PetriNetUnfolderBase]: 1136/1962 cut-off events. [2024-06-28 02:23:50,174 INFO L125 PetriNetUnfolderBase]: For 42947/42949 co-relation queries the response was YES. [2024-06-28 02:23:50,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9835 conditions, 1962 events. 1136/1962 cut-off events. For 42947/42949 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11062 event pairs, 248 based on Foata normal form. 8/1963 useless extension candidates. Maximal degree in co-relation 9762. Up to 1545 conditions per place. [2024-06-28 02:23:50,187 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-28 02:23:50,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 161 transitions, 1791 flow [2024-06-28 02:23:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 02:23:50,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-28 02:23:50,188 INFO L175 Difference]: Start difference. First operand has 153 places, 134 transitions, 1305 flow. Second operand 7 states and 164 transitions. [2024-06-28 02:23:50,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 161 transitions, 1791 flow [2024-06-28 02:23:50,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 161 transitions, 1708 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:50,254 INFO L231 Difference]: Finished difference. Result has 153 places, 135 transitions, 1322 flow [2024-06-28 02:23:50,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=153, PETRI_TRANSITIONS=135} [2024-06-28 02:23:50,255 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-28 02:23:50,255 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 135 transitions, 1322 flow [2024-06-28 02:23:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:50,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:50,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:23:50,255 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)] === [2024-06-28 02:23:50,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 670043255, now seen corresponding path program 5 times [2024-06-28 02:23:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127344054] [2024-06-28 02:23:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:50,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:50,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127344054] [2024-06-28 02:23:50,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127344054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:50,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:50,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293830663] [2024-06-28 02:23:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:50,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:50,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:50,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:50,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 135 transitions, 1322 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:50,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:50,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:50,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:50,572 INFO L124 PetriNetUnfolderBase]: 1143/1973 cut-off events. [2024-06-28 02:23:50,573 INFO L125 PetriNetUnfolderBase]: For 44252/44252 co-relation queries the response was YES. [2024-06-28 02:23:50,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9972 conditions, 1973 events. 1143/1973 cut-off events. For 44252/44252 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11147 event pairs, 210 based on Foata normal form. 6/1972 useless extension candidates. Maximal degree in co-relation 9898. Up to 1125 conditions per place. [2024-06-28 02:23:50,588 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 106 selfloop transitions, 44 changer transitions 0/157 dead transitions. [2024-06-28 02:23:50,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 157 transitions, 1798 flow [2024-06-28 02:23:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 02:23:50,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-28 02:23:50,589 INFO L175 Difference]: Start difference. First operand has 153 places, 135 transitions, 1322 flow. Second operand 6 states and 140 transitions. [2024-06-28 02:23:50,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 157 transitions, 1798 flow [2024-06-28 02:23:50,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 157 transitions, 1710 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:50,652 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1350 flow [2024-06-28 02:23:50,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1350, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-28 02:23:50,653 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-28 02:23:50,653 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1350 flow [2024-06-28 02:23:50,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:50,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:50,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:50,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 02:23:50,653 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)] === [2024-06-28 02:23:50,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash 40979609, now seen corresponding path program 6 times [2024-06-28 02:23:50,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:50,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907550182] [2024-06-28 02:23:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:50,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907550182] [2024-06-28 02:23:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907550182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:50,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:50,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962510348] [2024-06-28 02:23:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:50,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:50,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1350 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:50,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:50,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:50,979 INFO L124 PetriNetUnfolderBase]: 1125/1942 cut-off events. [2024-06-28 02:23:50,979 INFO L125 PetriNetUnfolderBase]: For 41797/41797 co-relation queries the response was YES. [2024-06-28 02:23:50,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 1942 events. 1125/1942 cut-off events. For 41797/41797 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10971 event pairs, 346 based on Foata normal form. 8/1948 useless extension candidates. Maximal degree in co-relation 9557. Up to 1651 conditions per place. [2024-06-28 02:23:50,992 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 110 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-28 02:23:50,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 148 transitions, 1674 flow [2024-06-28 02:23:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 02:23:50,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-28 02:23:50,993 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1350 flow. Second operand 7 states and 152 transitions. [2024-06-28 02:23:50,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 148 transitions, 1674 flow [2024-06-28 02:23:51,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 1599 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:51,075 INFO L231 Difference]: Finished difference. Result has 158 places, 136 transitions, 1342 flow [2024-06-28 02:23:51,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=158, PETRI_TRANSITIONS=136} [2024-06-28 02:23:51,076 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 118 predicate places. [2024-06-28 02:23:51,076 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 136 transitions, 1342 flow [2024-06-28 02:23:51,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:51,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:51,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:51,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 02:23:51,076 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)] === [2024-06-28 02:23:51,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1522335277, now seen corresponding path program 6 times [2024-06-28 02:23:51,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:51,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127086236] [2024-06-28 02:23:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127086236] [2024-06-28 02:23:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127086236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:51,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:51,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94080951] [2024-06-28 02:23:51,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:51,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:51,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 136 transitions, 1342 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:51,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:51,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:51,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:51,440 INFO L124 PetriNetUnfolderBase]: 1229/2117 cut-off events. [2024-06-28 02:23:51,441 INFO L125 PetriNetUnfolderBase]: For 64431/64431 co-relation queries the response was YES. [2024-06-28 02:23:51,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10163 conditions, 2117 events. 1229/2117 cut-off events. For 64431/64431 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12239 event pairs, 389 based on Foata normal form. 34/2149 useless extension candidates. Maximal degree in co-relation 10087. Up to 1627 conditions per place. [2024-06-28 02:23:51,455 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 53 changer transitions 3/156 dead transitions. [2024-06-28 02:23:51,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 156 transitions, 1730 flow [2024-06-28 02:23:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-28 02:23:51,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-28 02:23:51,456 INFO L175 Difference]: Start difference. First operand has 158 places, 136 transitions, 1342 flow. Second operand 9 states and 198 transitions. [2024-06-28 02:23:51,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 156 transitions, 1730 flow [2024-06-28 02:23:51,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 156 transitions, 1655 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:51,531 INFO L231 Difference]: Finished difference. Result has 161 places, 136 transitions, 1400 flow [2024-06-28 02:23:51,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1400, PETRI_PLACES=161, PETRI_TRANSITIONS=136} [2024-06-28 02:23:51,531 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-28 02:23:51,531 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 136 transitions, 1400 flow [2024-06-28 02:23:51,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:51,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:51,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:51,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 02:23:51,532 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)] === [2024-06-28 02:23:51,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008387, now seen corresponding path program 2 times [2024-06-28 02:23:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:51,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133422909] [2024-06-28 02:23:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:51,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133422909] [2024-06-28 02:23:51,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133422909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:51,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:51,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:51,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105546851] [2024-06-28 02:23:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:51,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:51,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:51,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 136 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:51,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:51,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:51,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:51,863 INFO L124 PetriNetUnfolderBase]: 1239/2132 cut-off events. [2024-06-28 02:23:51,863 INFO L125 PetriNetUnfolderBase]: For 45361/45361 co-relation queries the response was YES. [2024-06-28 02:23:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 2132 events. 1239/2132 cut-off events. For 45361/45361 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12264 event pairs, 392 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 10345. Up to 1769 conditions per place. [2024-06-28 02:23:51,880 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-28 02:23:51,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 153 transitions, 1775 flow [2024-06-28 02:23:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 02:23:51,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 02:23:51,882 INFO L175 Difference]: Start difference. First operand has 161 places, 136 transitions, 1400 flow. Second operand 8 states and 173 transitions. [2024-06-28 02:23:51,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 153 transitions, 1775 flow [2024-06-28 02:23:51,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 1655 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:51,977 INFO L231 Difference]: Finished difference. Result has 162 places, 137 transitions, 1381 flow [2024-06-28 02:23:51,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=162, PETRI_TRANSITIONS=137} [2024-06-28 02:23:51,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-06-28 02:23:51,978 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 137 transitions, 1381 flow [2024-06-28 02:23:51,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:51,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:51,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:51,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 02:23:51,979 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)] === [2024-06-28 02:23:51,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1590511263, now seen corresponding path program 7 times [2024-06-28 02:23:51,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:51,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87636983] [2024-06-28 02:23:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:52,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:52,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87636983] [2024-06-28 02:23:52,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87636983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:52,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504005560] [2024-06-28 02:23:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:52,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:52,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:52,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 137 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:52,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:52,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:52,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:52,419 INFO L124 PetriNetUnfolderBase]: 1335/2313 cut-off events. [2024-06-28 02:23:52,419 INFO L125 PetriNetUnfolderBase]: For 67621/67621 co-relation queries the response was YES. [2024-06-28 02:23:52,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 2313 events. 1335/2313 cut-off events. For 67621/67621 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13649 event pairs, 395 based on Foata normal form. 30/2341 useless extension candidates. Maximal degree in co-relation 10932. Up to 1595 conditions per place. [2024-06-28 02:23:52,436 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 95 selfloop transitions, 58 changer transitions 6/166 dead transitions. [2024-06-28 02:23:52,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 166 transitions, 1849 flow [2024-06-28 02:23:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-28 02:23:52,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-28 02:23:52,437 INFO L175 Difference]: Start difference. First operand has 162 places, 137 transitions, 1381 flow. Second operand 10 states and 221 transitions. [2024-06-28 02:23:52,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 166 transitions, 1849 flow [2024-06-28 02:23:52,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 1758 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:52,539 INFO L231 Difference]: Finished difference. Result has 167 places, 139 transitions, 1464 flow [2024-06-28 02:23:52,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1464, PETRI_PLACES=167, PETRI_TRANSITIONS=139} [2024-06-28 02:23:52,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-28 02:23:52,539 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 139 transitions, 1464 flow [2024-06-28 02:23:52,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:52,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:52,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:52,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 02:23:52,540 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)] === [2024-06-28 02:23:52,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1763350785, now seen corresponding path program 3 times [2024-06-28 02:23:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:52,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102533607] [2024-06-28 02:23:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:52,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:52,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102533607] [2024-06-28 02:23:52,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102533607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:52,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:52,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806305614] [2024-06-28 02:23:52,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:52,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:52,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:52,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:52,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:52,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 139 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:52,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:52,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:52,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:52,841 INFO L124 PetriNetUnfolderBase]: 1325/2293 cut-off events. [2024-06-28 02:23:52,842 INFO L125 PetriNetUnfolderBase]: For 50156/50156 co-relation queries the response was YES. [2024-06-28 02:23:52,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11140 conditions, 2293 events. 1325/2293 cut-off events. For 50156/50156 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13418 event pairs, 261 based on Foata normal form. 6/2292 useless extension candidates. Maximal degree in co-relation 11060. Up to 1415 conditions per place. [2024-06-28 02:23:52,858 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 105 selfloop transitions, 49 changer transitions 0/161 dead transitions. [2024-06-28 02:23:52,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 161 transitions, 1961 flow [2024-06-28 02:23:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 02:23:52,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-28 02:23:52,859 INFO L175 Difference]: Start difference. First operand has 167 places, 139 transitions, 1464 flow. Second operand 6 states and 140 transitions. [2024-06-28 02:23:52,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 161 transitions, 1961 flow [2024-06-28 02:23:52,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 161 transitions, 1831 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:52,942 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1465 flow [2024-06-28 02:23:52,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1465, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-28 02:23:52,943 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 125 predicate places. [2024-06-28 02:23:52,943 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1465 flow [2024-06-28 02:23:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:52,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:52,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 02:23:52,943 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)] === [2024-06-28 02:23:52,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash 454470939, now seen corresponding path program 4 times [2024-06-28 02:23:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:52,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790400218] [2024-06-28 02:23:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790400218] [2024-06-28 02:23:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790400218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:53,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:53,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950717722] [2024-06-28 02:23:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:53,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:53,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1465 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:53,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:53,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:53,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:53,316 INFO L124 PetriNetUnfolderBase]: 1312/2282 cut-off events. [2024-06-28 02:23:53,316 INFO L125 PetriNetUnfolderBase]: For 44443/44443 co-relation queries the response was YES. [2024-06-28 02:23:53,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10782 conditions, 2282 events. 1312/2282 cut-off events. For 44443/44443 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13400 event pairs, 324 based on Foata normal form. 6/2286 useless extension candidates. Maximal degree in co-relation 10702. Up to 1762 conditions per place. [2024-06-28 02:23:53,331 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 105 selfloop transitions, 47 changer transitions 0/159 dead transitions. [2024-06-28 02:23:53,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 159 transitions, 1849 flow [2024-06-28 02:23:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 02:23:53,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-28 02:23:53,332 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1465 flow. Second operand 7 states and 160 transitions. [2024-06-28 02:23:53,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 159 transitions, 1849 flow [2024-06-28 02:23:53,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 159 transitions, 1639 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:53,434 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1353 flow [2024-06-28 02:23:53,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1353, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-28 02:23:53,434 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-28 02:23:53,434 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1353 flow [2024-06-28 02:23:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:53,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:53,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:53,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 02:23:53,435 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)] === [2024-06-28 02:23:53,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1576701693, now seen corresponding path program 8 times [2024-06-28 02:23:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:53,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622971905] [2024-06-28 02:23:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:53,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:53,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622971905] [2024-06-28 02:23:53,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622971905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:53,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:53,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731650083] [2024-06-28 02:23:53,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:53,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:53,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:53,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:53,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1353 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:53,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:53,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:53,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:53,869 INFO L124 PetriNetUnfolderBase]: 1535/2663 cut-off events. [2024-06-28 02:23:53,870 INFO L125 PetriNetUnfolderBase]: For 92055/92055 co-relation queries the response was YES. [2024-06-28 02:23:53,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12761 conditions, 2663 events. 1535/2663 cut-off events. For 92055/92055 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16144 event pairs, 429 based on Foata normal form. 30/2691 useless extension candidates. Maximal degree in co-relation 12682. Up to 1364 conditions per place. [2024-06-28 02:23:53,888 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 65 changer transitions 8/173 dead transitions. [2024-06-28 02:23:53,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 173 transitions, 1945 flow [2024-06-28 02:23:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-28 02:23:53,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-28 02:23:53,889 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1353 flow. Second operand 9 states and 208 transitions. [2024-06-28 02:23:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 173 transitions, 1945 flow [2024-06-28 02:23:54,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 1818 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:54,029 INFO L231 Difference]: Finished difference. Result has 169 places, 141 transitions, 1390 flow [2024-06-28 02:23:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1390, PETRI_PLACES=169, PETRI_TRANSITIONS=141} [2024-06-28 02:23:54,029 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-28 02:23:54,029 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 141 transitions, 1390 flow [2024-06-28 02:23:54,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:54,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:54,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:54,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 02:23:54,030 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)] === [2024-06-28 02:23:54,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1046672147, now seen corresponding path program 9 times [2024-06-28 02:23:54,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:54,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533957903] [2024-06-28 02:23:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:54,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:54,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:54,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533957903] [2024-06-28 02:23:54,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533957903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:54,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:54,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43372554] [2024-06-28 02:23:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:54,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:54,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 141 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:54,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:54,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:54,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:54,387 INFO L124 PetriNetUnfolderBase]: 1348/2310 cut-off events. [2024-06-28 02:23:54,387 INFO L125 PetriNetUnfolderBase]: For 86167/86167 co-relation queries the response was YES. [2024-06-28 02:23:54,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12557 conditions, 2310 events. 1348/2310 cut-off events. For 86167/86167 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13410 event pairs, 451 based on Foata normal form. 6/2314 useless extension candidates. Maximal degree in co-relation 12477. Up to 1750 conditions per place. [2024-06-28 02:23:54,405 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2024-06-28 02:23:54,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 165 transitions, 2048 flow [2024-06-28 02:23:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:23:54,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 02:23:54,405 INFO L175 Difference]: Start difference. First operand has 169 places, 141 transitions, 1390 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:23:54,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 165 transitions, 2048 flow [2024-06-28 02:23:54,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 165 transitions, 1880 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:54,532 INFO L231 Difference]: Finished difference. Result has 170 places, 144 transitions, 1440 flow [2024-06-28 02:23:54,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=170, PETRI_TRANSITIONS=144} [2024-06-28 02:23:54,532 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-28 02:23:54,532 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 144 transitions, 1440 flow [2024-06-28 02:23:54,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:54,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:54,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:54,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 02:23:54,533 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)] === [2024-06-28 02:23:54,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2054732605, now seen corresponding path program 10 times [2024-06-28 02:23:54,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:54,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009378761] [2024-06-28 02:23:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:54,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:54,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:54,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009378761] [2024-06-28 02:23:54,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009378761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:54,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:54,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127430048] [2024-06-28 02:23:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:54,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:54,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 144 transitions, 1440 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:54,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:54,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:54,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:54,896 INFO L124 PetriNetUnfolderBase]: 1208/2096 cut-off events. [2024-06-28 02:23:54,896 INFO L125 PetriNetUnfolderBase]: For 54207/54207 co-relation queries the response was YES. [2024-06-28 02:23:54,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10146 conditions, 2096 events. 1208/2096 cut-off events. For 54207/54207 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12086 event pairs, 383 based on Foata normal form. 6/2100 useless extension candidates. Maximal degree in co-relation 10066. Up to 1782 conditions per place. [2024-06-28 02:23:54,910 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 117 selfloop transitions, 34 changer transitions 0/158 dead transitions. [2024-06-28 02:23:54,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 158 transitions, 1780 flow [2024-06-28 02:23:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 02:23:54,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-28 02:23:54,910 INFO L175 Difference]: Start difference. First operand has 170 places, 144 transitions, 1440 flow. Second operand 8 states and 170 transitions. [2024-06-28 02:23:54,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 158 transitions, 1780 flow [2024-06-28 02:23:55,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1631 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:55,015 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 1363 flow [2024-06-28 02:23:55,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1363, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2024-06-28 02:23:55,015 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-28 02:23:55,015 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 1363 flow [2024-06-28 02:23:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:55,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 02:23:55,016 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)] === [2024-06-28 02:23:55,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1354210083, now seen corresponding path program 11 times [2024-06-28 02:23:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:55,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838715456] [2024-06-28 02:23:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:55,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:55,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838715456] [2024-06-28 02:23:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838715456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202964162] [2024-06-28 02:23:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:55,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:55,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:55,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:55,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 144 transitions, 1363 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:55,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:55,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:55,350 INFO L124 PetriNetUnfolderBase]: 1236/2144 cut-off events. [2024-06-28 02:23:55,351 INFO L125 PetriNetUnfolderBase]: For 55882/55882 co-relation queries the response was YES. [2024-06-28 02:23:55,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10166 conditions, 2144 events. 1236/2144 cut-off events. For 55882/55882 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12402 event pairs, 420 based on Foata normal form. 8/2150 useless extension candidates. Maximal degree in co-relation 10086. Up to 1805 conditions per place. [2024-06-28 02:23:55,368 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 52 changer transitions 0/158 dead transitions. [2024-06-28 02:23:55,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 158 transitions, 1737 flow [2024-06-28 02:23:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 02:23:55,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 02:23:55,369 INFO L175 Difference]: Start difference. First operand has 173 places, 144 transitions, 1363 flow. Second operand 8 states and 173 transitions. [2024-06-28 02:23:55,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 158 transitions, 1737 flow [2024-06-28 02:23:55,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1635 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:55,482 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 1400 flow [2024-06-28 02:23:55,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2024-06-28 02:23:55,482 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-28 02:23:55,482 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 1400 flow [2024-06-28 02:23:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:55,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:55,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 02:23:55,483 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)] === [2024-06-28 02:23:55,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1896028671, now seen corresponding path program 12 times [2024-06-28 02:23:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:55,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512544627] [2024-06-28 02:23:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:55,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:55,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512544627] [2024-06-28 02:23:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512544627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:55,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:55,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122079519] [2024-06-28 02:23:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:55,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:55,792 INFO L124 PetriNetUnfolderBase]: 1218/2118 cut-off events. [2024-06-28 02:23:55,792 INFO L125 PetriNetUnfolderBase]: For 49578/49578 co-relation queries the response was YES. [2024-06-28 02:23:55,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9641 conditions, 2118 events. 1218/2118 cut-off events. For 49578/49578 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12279 event pairs, 396 based on Foata normal form. 8/2124 useless extension candidates. Maximal degree in co-relation 9561. Up to 1671 conditions per place. [2024-06-28 02:23:55,807 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 101 selfloop transitions, 54 changer transitions 0/162 dead transitions. [2024-06-28 02:23:55,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 162 transitions, 1778 flow [2024-06-28 02:23:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-28 02:23:55,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-28 02:23:55,808 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 1400 flow. Second operand 8 states and 176 transitions. [2024-06-28 02:23:55,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 162 transitions, 1778 flow [2024-06-28 02:23:55,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 162 transitions, 1632 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:55,948 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 1366 flow [2024-06-28 02:23:55,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-06-28 02:23:55,948 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-28 02:23:55,948 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 1366 flow [2024-06-28 02:23:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:55,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:55,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 02:23:55,949 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)] === [2024-06-28 02:23:55,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -221382683, now seen corresponding path program 13 times [2024-06-28 02:23:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581547346] [2024-06-28 02:23:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:56,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581547346] [2024-06-28 02:23:56,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581547346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:56,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:56,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987479225] [2024-06-28 02:23:56,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:56,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:56,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 1366 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:56,342 INFO L124 PetriNetUnfolderBase]: 1279/2219 cut-off events. [2024-06-28 02:23:56,343 INFO L125 PetriNetUnfolderBase]: For 53826/53826 co-relation queries the response was YES. [2024-06-28 02:23:56,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10293 conditions, 2219 events. 1279/2219 cut-off events. For 53826/53826 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12915 event pairs, 301 based on Foata normal form. 6/2223 useless extension candidates. Maximal degree in co-relation 10213. Up to 1706 conditions per place. [2024-06-28 02:23:56,358 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 112 selfloop transitions, 53 changer transitions 0/172 dead transitions. [2024-06-28 02:23:56,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 172 transitions, 1938 flow [2024-06-28 02:23:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-28 02:23:56,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 02:23:56,359 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 1366 flow. Second operand 9 states and 195 transitions. [2024-06-28 02:23:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 172 transitions, 1938 flow [2024-06-28 02:23:56,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 172 transitions, 1810 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:56,482 INFO L231 Difference]: Finished difference. Result has 176 places, 149 transitions, 1420 flow [2024-06-28 02:23:56,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1420, PETRI_PLACES=176, PETRI_TRANSITIONS=149} [2024-06-28 02:23:56,482 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-28 02:23:56,482 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 149 transitions, 1420 flow [2024-06-28 02:23:56,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:56,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:56,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 02:23:56,483 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)] === [2024-06-28 02:23:56,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash -226144283, now seen corresponding path program 14 times [2024-06-28 02:23:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666212499] [2024-06-28 02:23:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:56,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:56,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666212499] [2024-06-28 02:23:56,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666212499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:56,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:56,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314517186] [2024-06-28 02:23:56,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:56,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:56,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:56,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:56,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 149 transitions, 1420 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:56,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:56,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:56,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:56,851 INFO L124 PetriNetUnfolderBase]: 1393/2395 cut-off events. [2024-06-28 02:23:56,851 INFO L125 PetriNetUnfolderBase]: For 78947/78947 co-relation queries the response was YES. [2024-06-28 02:23:56,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 2395 events. 1393/2395 cut-off events. For 78947/78947 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14079 event pairs, 415 based on Foata normal form. 6/2399 useless extension candidates. Maximal degree in co-relation 11780. Up to 1246 conditions per place. [2024-06-28 02:23:56,869 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 90 selfloop transitions, 76 changer transitions 0/173 dead transitions. [2024-06-28 02:23:56,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 2030 flow [2024-06-28 02:23:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-28 02:23:56,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-28 02:23:56,870 INFO L175 Difference]: Start difference. First operand has 176 places, 149 transitions, 1420 flow. Second operand 8 states and 181 transitions. [2024-06-28 02:23:56,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 2030 flow [2024-06-28 02:23:57,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 1939 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:57,018 INFO L231 Difference]: Finished difference. Result has 180 places, 149 transitions, 1485 flow [2024-06-28 02:23:57,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=180, PETRI_TRANSITIONS=149} [2024-06-28 02:23:57,019 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-28 02:23:57,019 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 149 transitions, 1485 flow [2024-06-28 02:23:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:57,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:57,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 02:23:57,019 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)] === [2024-06-28 02:23:57,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1197254731, now seen corresponding path program 15 times [2024-06-28 02:23:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524247375] [2024-06-28 02:23:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:57,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524247375] [2024-06-28 02:23:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524247375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:57,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785752562] [2024-06-28 02:23:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:57,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:57,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:57,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 149 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:57,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:57,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:57,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:57,390 INFO L124 PetriNetUnfolderBase]: 1380/2378 cut-off events. [2024-06-28 02:23:57,390 INFO L125 PetriNetUnfolderBase]: For 74568/74568 co-relation queries the response was YES. [2024-06-28 02:23:57,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11661 conditions, 2378 events. 1380/2378 cut-off events. For 74568/74568 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14006 event pairs, 364 based on Foata normal form. 6/2382 useless extension candidates. Maximal degree in co-relation 11579. Up to 1958 conditions per place. [2024-06-28 02:23:57,408 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 50 changer transitions 0/167 dead transitions. [2024-06-28 02:23:57,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 167 transitions, 1867 flow [2024-06-28 02:23:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-28 02:23:57,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-28 02:23:57,409 INFO L175 Difference]: Start difference. First operand has 180 places, 149 transitions, 1485 flow. Second operand 8 states and 175 transitions. [2024-06-28 02:23:57,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 167 transitions, 1867 flow [2024-06-28 02:23:57,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 167 transitions, 1607 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:57,557 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 1329 flow [2024-06-28 02:23:57,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=173, 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=8, PETRI_FLOW=1329, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2024-06-28 02:23:57,558 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-28 02:23:57,558 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 1329 flow [2024-06-28 02:23:57,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:57,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:57,558 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] [2024-06-28 02:23:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 02:23:57,559 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)] === [2024-06-28 02:23:57,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1331484617, now seen corresponding path program 1 times [2024-06-28 02:23:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:57,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026408148] [2024-06-28 02:23:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:57,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026408148] [2024-06-28 02:23:57,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026408148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:57,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:57,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:57,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23994856] [2024-06-28 02:23:57,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:57,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:57,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 1329 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:57,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:57,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:57,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:57,973 INFO L124 PetriNetUnfolderBase]: 1455/2546 cut-off events. [2024-06-28 02:23:57,973 INFO L125 PetriNetUnfolderBase]: For 86579/86580 co-relation queries the response was YES. [2024-06-28 02:23:57,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 2546 events. 1455/2546 cut-off events. For 86579/86580 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15521 event pairs, 247 based on Foata normal form. 19/2564 useless extension candidates. Maximal degree in co-relation 11222. Up to 1667 conditions per place. [2024-06-28 02:23:57,991 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 27 changer transitions 11/184 dead transitions. [2024-06-28 02:23:57,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 184 transitions, 1926 flow [2024-06-28 02:23:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:23:57,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 02:23:57,992 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 1329 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:23:57,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 184 transitions, 1926 flow [2024-06-28 02:23:58,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 184 transitions, 1796 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:58,234 INFO L231 Difference]: Finished difference. Result has 180 places, 149 transitions, 1276 flow [2024-06-28 02:23:58,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1276, PETRI_PLACES=180, PETRI_TRANSITIONS=149} [2024-06-28 02:23:58,235 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-28 02:23:58,235 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 149 transitions, 1276 flow [2024-06-28 02:23:58,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:58,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:58,235 INFO 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] [2024-06-28 02:23:58,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 02:23:58,236 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)] === [2024-06-28 02:23:58,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1331186087, now seen corresponding path program 2 times [2024-06-28 02:23:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:58,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542857664] [2024-06-28 02:23:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:58,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:58,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542857664] [2024-06-28 02:23:58,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542857664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:58,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:58,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720300169] [2024-06-28 02:23:58,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:58,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:58,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:58,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 149 transitions, 1276 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:58,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:58,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:58,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:58,642 INFO L124 PetriNetUnfolderBase]: 1371/2398 cut-off events. [2024-06-28 02:23:58,642 INFO L125 PetriNetUnfolderBase]: For 82340/82341 co-relation queries the response was YES. [2024-06-28 02:23:58,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10588 conditions, 2398 events. 1371/2398 cut-off events. For 82340/82341 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14443 event pairs, 306 based on Foata normal form. 19/2416 useless extension candidates. Maximal degree in co-relation 10505. Up to 1667 conditions per place. [2024-06-28 02:23:58,659 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 138 selfloop transitions, 22 changer transitions 10/177 dead transitions. [2024-06-28 02:23:58,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 177 transitions, 1818 flow [2024-06-28 02:23:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 02:23:58,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970695970695971 [2024-06-28 02:23:58,660 INFO L175 Difference]: Start difference. First operand has 180 places, 149 transitions, 1276 flow. Second operand 7 states and 163 transitions. [2024-06-28 02:23:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 177 transitions, 1818 flow [2024-06-28 02:23:58,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 177 transitions, 1772 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:58,792 INFO L231 Difference]: Finished difference. Result has 179 places, 145 transitions, 1241 flow [2024-06-28 02:23:58,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1241, PETRI_PLACES=179, PETRI_TRANSITIONS=145} [2024-06-28 02:23:58,796 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 139 predicate places. [2024-06-28 02:23:58,796 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 145 transitions, 1241 flow [2024-06-28 02:23:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:58,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:58,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:58,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 02:23:58,797 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)] === [2024-06-28 02:23:58,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1250014537, now seen corresponding path program 1 times [2024-06-28 02:23:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426909308] [2024-06-28 02:23:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:58,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426909308] [2024-06-28 02:23:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426909308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289339552] [2024-06-28 02:23:58,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:58,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:58,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:58,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:58,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 145 transitions, 1241 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:58,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:58,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:58,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:59,178 INFO L124 PetriNetUnfolderBase]: 1335/2330 cut-off events. [2024-06-28 02:23:59,178 INFO L125 PetriNetUnfolderBase]: For 79146/79147 co-relation queries the response was YES. [2024-06-28 02:23:59,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10262 conditions, 2330 events. 1335/2330 cut-off events. For 79146/79147 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13860 event pairs, 237 based on Foata normal form. 19/2348 useless extension candidates. Maximal degree in co-relation 10180. Up to 1667 conditions per place. [2024-06-28 02:23:59,195 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 136 selfloop transitions, 23 changer transitions 8/174 dead transitions. [2024-06-28 02:23:59,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 174 transitions, 1785 flow [2024-06-28 02:23:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 02:23:59,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-28 02:23:59,195 INFO L175 Difference]: Start difference. First operand has 179 places, 145 transitions, 1241 flow. Second operand 7 states and 164 transitions. [2024-06-28 02:23:59,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 174 transitions, 1785 flow [2024-06-28 02:23:59,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 1731 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:23:59,361 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1221 flow [2024-06-28 02:23:59,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-28 02:23:59,362 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-28 02:23:59,362 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1221 flow [2024-06-28 02:23:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:59,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:59,362 INFO 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] [2024-06-28 02:23:59,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 02:23:59,363 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)] === [2024-06-28 02:23:59,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1250008957, now seen corresponding path program 2 times [2024-06-28 02:23:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062062879] [2024-06-28 02:23:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:59,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:59,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062062879] [2024-06-28 02:23:59,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062062879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:59,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:59,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993132195] [2024-06-28 02:23:59,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:59,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:59,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:59,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:23:59,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1221 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:59,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:59,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:23:59,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:59,711 INFO L124 PetriNetUnfolderBase]: 1230/2143 cut-off events. [2024-06-28 02:23:59,712 INFO L125 PetriNetUnfolderBase]: For 57123/57124 co-relation queries the response was YES. [2024-06-28 02:23:59,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 2143 events. 1230/2143 cut-off events. For 57123/57124 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12528 event pairs, 219 based on Foata normal form. 19/2161 useless extension candidates. Maximal degree in co-relation 8711. Up to 1667 conditions per place. [2024-06-28 02:23:59,726 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 133 selfloop transitions, 20 changer transitions 10/170 dead transitions. [2024-06-28 02:23:59,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 1647 flow [2024-06-28 02:23:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:23:59,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-28 02:23:59,726 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1221 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:23:59,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 1647 flow [2024-06-28 02:23:59,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 170 transitions, 1597 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:59,874 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1169 flow [2024-06-28 02:23:59,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-06-28 02:23:59,874 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-28 02:23:59,874 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1169 flow [2024-06-28 02:23:59,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:59,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:59,875 INFO 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] [2024-06-28 02:23:59,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 02:23:59,875 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)] === [2024-06-28 02:23:59,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1682775713, now seen corresponding path program 3 times [2024-06-28 02:23:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:59,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588952946] [2024-06-28 02:23:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:59,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588952946] [2024-06-28 02:23:59,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588952946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:59,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012283701] [2024-06-28 02:23:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:59,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:59,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:00,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:00,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:00,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:00,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:00,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:00,259 INFO L124 PetriNetUnfolderBase]: 1283/2240 cut-off events. [2024-06-28 02:24:00,259 INFO L125 PetriNetUnfolderBase]: For 79189/79190 co-relation queries the response was YES. [2024-06-28 02:24:00,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9891 conditions, 2240 events. 1283/2240 cut-off events. For 79189/79190 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13229 event pairs, 239 based on Foata normal form. 19/2258 useless extension candidates. Maximal degree in co-relation 9811. Up to 1579 conditions per place. [2024-06-28 02:24:00,275 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 24 changer transitions 8/178 dead transitions. [2024-06-28 02:24:00,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 1757 flow [2024-06-28 02:24:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-28 02:24:00,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-28 02:24:00,276 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1169 flow. Second operand 10 states and 219 transitions. [2024-06-28 02:24:00,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 1757 flow [2024-06-28 02:24:00,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 178 transitions, 1685 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:00,414 INFO L231 Difference]: Finished difference. Result has 175 places, 137 transitions, 1133 flow [2024-06-28 02:24:00,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1133, PETRI_PLACES=175, PETRI_TRANSITIONS=137} [2024-06-28 02:24:00,414 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-28 02:24:00,414 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 137 transitions, 1133 flow [2024-06-28 02:24:00,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:00,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:00,415 INFO 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] [2024-06-28 02:24:00,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 02:24:00,415 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)] === [2024-06-28 02:24:00,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2039944023, now seen corresponding path program 4 times [2024-06-28 02:24:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:00,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836618697] [2024-06-28 02:24:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:00,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:00,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:00,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836618697] [2024-06-28 02:24:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836618697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:00,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:00,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211149269] [2024-06-28 02:24:00,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:00,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:00,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:00,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:00,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:00,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 137 transitions, 1133 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:00,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:00,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:00,771 INFO L124 PetriNetUnfolderBase]: 1178/2053 cut-off events. [2024-06-28 02:24:00,771 INFO L125 PetriNetUnfolderBase]: For 56992/56993 co-relation queries the response was YES. [2024-06-28 02:24:00,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2053 events. 1178/2053 cut-off events. For 56992/56993 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11876 event pairs, 227 based on Foata normal form. 19/2071 useless extension candidates. Maximal degree in co-relation 8363. Up to 1579 conditions per place. [2024-06-28 02:24:00,786 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 127 selfloop transitions, 21 changer transitions 12/167 dead transitions. [2024-06-28 02:24:00,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 167 transitions, 1567 flow [2024-06-28 02:24:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:24:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 02:24:00,786 INFO L175 Difference]: Start difference. First operand has 175 places, 137 transitions, 1133 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:24:00,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 167 transitions, 1567 flow [2024-06-28 02:24:00,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 167 transitions, 1492 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 02:24:00,905 INFO L231 Difference]: Finished difference. Result has 171 places, 135 transitions, 1089 flow [2024-06-28 02:24:00,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1089, PETRI_PLACES=171, PETRI_TRANSITIONS=135} [2024-06-28 02:24:00,905 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-28 02:24:00,905 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 135 transitions, 1089 flow [2024-06-28 02:24:00,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:00,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:00,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 02:24:00,905 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)] === [2024-06-28 02:24:00,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2043663093, now seen corresponding path program 5 times [2024-06-28 02:24:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535767983] [2024-06-28 02:24:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:00,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535767983] [2024-06-28 02:24:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535767983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:00,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490664890] [2024-06-28 02:24:00,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:00,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:01,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:01,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 135 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:01,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:01,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:01,223 INFO L124 PetriNetUnfolderBase]: 1154/2001 cut-off events. [2024-06-28 02:24:01,223 INFO L125 PetriNetUnfolderBase]: For 56869/56870 co-relation queries the response was YES. [2024-06-28 02:24:01,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8187 conditions, 2001 events. 1154/2001 cut-off events. For 56869/56870 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11451 event pairs, 246 based on Foata normal form. 19/2019 useless extension candidates. Maximal degree in co-relation 8109. Up to 1511 conditions per place. [2024-06-28 02:24:01,236 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 121 selfloop transitions, 17 changer transitions 20/165 dead transitions. [2024-06-28 02:24:01,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 165 transitions, 1519 flow [2024-06-28 02:24:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-28 02:24:01,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-28 02:24:01,237 INFO L175 Difference]: Start difference. First operand has 171 places, 135 transitions, 1089 flow. Second operand 8 states and 178 transitions. [2024-06-28 02:24:01,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 165 transitions, 1519 flow [2024-06-28 02:24:01,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 1473 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:24:01,337 INFO L231 Difference]: Finished difference. Result has 168 places, 129 transitions, 1026 flow [2024-06-28 02:24:01,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=168, PETRI_TRANSITIONS=129} [2024-06-28 02:24:01,338 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-28 02:24:01,338 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 129 transitions, 1026 flow [2024-06-28 02:24:01,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:01,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:01,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:01,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 02:24:01,338 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)] === [2024-06-28 02:24:01,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash 581354063, now seen corresponding path program 3 times [2024-06-28 02:24:01,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:01,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339265274] [2024-06-28 02:24:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:01,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339265274] [2024-06-28 02:24:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339265274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:01,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:01,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737065638] [2024-06-28 02:24:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:01,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:01,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 129 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:01,837 INFO L124 PetriNetUnfolderBase]: 1327/2309 cut-off events. [2024-06-28 02:24:01,838 INFO L125 PetriNetUnfolderBase]: For 112385/112386 co-relation queries the response was YES. [2024-06-28 02:24:01,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11487 conditions, 2309 events. 1327/2309 cut-off events. For 112385/112386 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13889 event pairs, 428 based on Foata normal form. 19/2326 useless extension candidates. Maximal degree in co-relation 11410. Up to 1268 conditions per place. [2024-06-28 02:24:01,852 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 116 selfloop transitions, 43 changer transitions 11/177 dead transitions. [2024-06-28 02:24:01,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 1730 flow [2024-06-28 02:24:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 02:24:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 02:24:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-28 02:24:01,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601577909270217 [2024-06-28 02:24:01,853 INFO L175 Difference]: Start difference. First operand has 168 places, 129 transitions, 1026 flow. Second operand 13 states and 284 transitions. [2024-06-28 02:24:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 1730 flow [2024-06-28 02:24:02,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 177 transitions, 1623 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-28 02:24:02,051 INFO L231 Difference]: Finished difference. Result has 164 places, 127 transitions, 1006 flow [2024-06-28 02:24:02,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1006, PETRI_PLACES=164, PETRI_TRANSITIONS=127} [2024-06-28 02:24:02,052 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2024-06-28 02:24:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 127 transitions, 1006 flow [2024-06-28 02:24:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:02,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:02,052 INFO 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] [2024-06-28 02:24:02,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 02:24:02,053 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)] === [2024-06-28 02:24:02,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1305194137, now seen corresponding path program 4 times [2024-06-28 02:24:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:02,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496345367] [2024-06-28 02:24:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:02,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496345367] [2024-06-28 02:24:02,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496345367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:02,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:02,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811940271] [2024-06-28 02:24:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:02,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:02,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 127 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:02,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:02,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:02,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:02,503 INFO L124 PetriNetUnfolderBase]: 1390/2390 cut-off events. [2024-06-28 02:24:02,503 INFO L125 PetriNetUnfolderBase]: For 129634/129635 co-relation queries the response was YES. [2024-06-28 02:24:02,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12711 conditions, 2390 events. 1390/2390 cut-off events. For 129634/129635 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14380 event pairs, 490 based on Foata normal form. 19/2407 useless extension candidates. Maximal degree in co-relation 12639. Up to 1268 conditions per place. [2024-06-28 02:24:02,520 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 41 changer transitions 9/172 dead transitions. [2024-06-28 02:24:02,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 172 transitions, 1684 flow [2024-06-28 02:24:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 02:24:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 02:24:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-28 02:24:02,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542406311637081 [2024-06-28 02:24:02,523 INFO L175 Difference]: Start difference. First operand has 164 places, 127 transitions, 1006 flow. Second operand 13 states and 281 transitions. [2024-06-28 02:24:02,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 172 transitions, 1684 flow [2024-06-28 02:24:02,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 172 transitions, 1588 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-28 02:24:02,675 INFO L231 Difference]: Finished difference. Result has 163 places, 124 transitions, 980 flow [2024-06-28 02:24:02,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=980, PETRI_PLACES=163, PETRI_TRANSITIONS=124} [2024-06-28 02:24:02,675 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-28 02:24:02,675 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 124 transitions, 980 flow [2024-06-28 02:24:02,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:02,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:02,676 INFO 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] [2024-06-28 02:24:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 02:24:02,676 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)] === [2024-06-28 02:24:02,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1103806357, now seen corresponding path program 5 times [2024-06-28 02:24:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407587031] [2024-06-28 02:24:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:02,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:02,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407587031] [2024-06-28 02:24:02,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407587031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:02,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:02,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464957833] [2024-06-28 02:24:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:02,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:02,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:02,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 124 transitions, 980 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:02,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:02,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:02,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:03,081 INFO L124 PetriNetUnfolderBase]: 1264/2172 cut-off events. [2024-06-28 02:24:03,081 INFO L125 PetriNetUnfolderBase]: For 105454/105455 co-relation queries the response was YES. [2024-06-28 02:24:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 2172 events. 1264/2172 cut-off events. For 105454/105455 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12751 event pairs, 474 based on Foata normal form. 25/2195 useless extension candidates. Maximal degree in co-relation 10774. Up to 1502 conditions per place. [2024-06-28 02:24:03,095 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 104 selfloop transitions, 38 changer transitions 13/162 dead transitions. [2024-06-28 02:24:03,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 162 transitions, 1514 flow [2024-06-28 02:24:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:24:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:24:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-28 02:24:03,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491452991452992 [2024-06-28 02:24:03,096 INFO L175 Difference]: Start difference. First operand has 163 places, 124 transitions, 980 flow. Second operand 12 states and 257 transitions. [2024-06-28 02:24:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 162 transitions, 1514 flow [2024-06-28 02:24:03,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 1421 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-28 02:24:03,186 INFO L231 Difference]: Finished difference. Result has 159 places, 121 transitions, 944 flow [2024-06-28 02:24:03,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=944, PETRI_PLACES=159, PETRI_TRANSITIONS=121} [2024-06-28 02:24:03,187 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-28 02:24:03,187 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 121 transitions, 944 flow [2024-06-28 02:24:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:03,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:03,187 INFO 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] [2024-06-28 02:24:03,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 02:24:03,187 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)] === [2024-06-28 02:24:03,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -555989371, now seen corresponding path program 6 times [2024-06-28 02:24:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:03,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707709859] [2024-06-28 02:24:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707709859] [2024-06-28 02:24:03,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707709859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:03,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:03,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859361829] [2024-06-28 02:24:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:03,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:03,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:03,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:03,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 121 transitions, 944 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:03,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:03,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:03,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:03,604 INFO L124 PetriNetUnfolderBase]: 1204/2068 cut-off events. [2024-06-28 02:24:03,605 INFO L125 PetriNetUnfolderBase]: For 98733/98734 co-relation queries the response was YES. [2024-06-28 02:24:03,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 2068 events. 1204/2068 cut-off events. For 98733/98734 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11989 event pairs, 508 based on Foata normal form. 27/2093 useless extension candidates. Maximal degree in co-relation 10234. Up to 1713 conditions per place. [2024-06-28 02:24:03,619 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 92 selfloop transitions, 33 changer transitions 17/149 dead transitions. [2024-06-28 02:24:03,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 149 transitions, 1316 flow [2024-06-28 02:24:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:24:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:24:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-28 02:24:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 02:24:03,620 INFO L175 Difference]: Start difference. First operand has 159 places, 121 transitions, 944 flow. Second operand 12 states and 247 transitions. [2024-06-28 02:24:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 149 transitions, 1316 flow [2024-06-28 02:24:03,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 1242 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 02:24:03,702 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 904 flow [2024-06-28 02:24:03,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=904, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2024-06-28 02:24:03,703 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-28 02:24:03,703 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 904 flow [2024-06-28 02:24:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:03,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:03,703 INFO 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] [2024-06-28 02:24:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 02:24:03,703 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)] === [2024-06-28 02:24:03,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash -268892791, now seen corresponding path program 7 times [2024-06-28 02:24:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:03,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306306329] [2024-06-28 02:24:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:03,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:03,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306306329] [2024-06-28 02:24:03,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306306329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:03,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:03,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:03,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178611230] [2024-06-28 02:24:03,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:03,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:03,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:03,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:03,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:03,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:03,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:04,074 INFO L124 PetriNetUnfolderBase]: 1071/1833 cut-off events. [2024-06-28 02:24:04,074 INFO L125 PetriNetUnfolderBase]: For 70450/70451 co-relation queries the response was YES. [2024-06-28 02:24:04,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 1833 events. 1071/1833 cut-off events. For 70450/70451 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10247 event pairs, 374 based on Foata normal form. 25/1856 useless extension candidates. Maximal degree in co-relation 8379. Up to 1268 conditions per place. [2024-06-28 02:24:04,086 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 31 changer transitions 10/147 dead transitions. [2024-06-28 02:24:04,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 147 transitions, 1384 flow [2024-06-28 02:24:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:24:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:24:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-28 02:24:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407925407925408 [2024-06-28 02:24:04,087 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 904 flow. Second operand 11 states and 232 transitions. [2024-06-28 02:24:04,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 147 transitions, 1384 flow [2024-06-28 02:24:04,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 147 transitions, 1306 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-28 02:24:04,161 INFO L231 Difference]: Finished difference. Result has 152 places, 113 transitions, 872 flow [2024-06-28 02:24:04,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=872, PETRI_PLACES=152, PETRI_TRANSITIONS=113} [2024-06-28 02:24:04,161 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-28 02:24:04,161 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 113 transitions, 872 flow [2024-06-28 02:24:04,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:04,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:04,161 INFO 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] [2024-06-28 02:24:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 02:24:04,161 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)] === [2024-06-28 02:24:04,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:04,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550647, now seen corresponding path program 8 times [2024-06-28 02:24:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249392797] [2024-06-28 02:24:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:04,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:04,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249392797] [2024-06-28 02:24:04,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249392797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:04,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:04,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376290043] [2024-06-28 02:24:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:04,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:04,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:04,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 113 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:04,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:04,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:04,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:04,480 INFO L124 PetriNetUnfolderBase]: 920/1580 cut-off events. [2024-06-28 02:24:04,480 INFO L125 PetriNetUnfolderBase]: For 44766/44767 co-relation queries the response was YES. [2024-06-28 02:24:04,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6447 conditions, 1580 events. 920/1580 cut-off events. For 44766/44767 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8618 event pairs, 331 based on Foata normal form. 27/1605 useless extension candidates. Maximal degree in co-relation 6381. Up to 1268 conditions per place. [2024-06-28 02:24:04,489 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 85 selfloop transitions, 25 changer transitions 19/136 dead transitions. [2024-06-28 02:24:04,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 136 transitions, 1206 flow [2024-06-28 02:24:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-28 02:24:04,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-28 02:24:04,490 INFO L175 Difference]: Start difference. First operand has 152 places, 113 transitions, 872 flow. Second operand 10 states and 207 transitions. [2024-06-28 02:24:04,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 136 transitions, 1206 flow [2024-06-28 02:24:04,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1143 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:04,539 INFO L231 Difference]: Finished difference. Result has 149 places, 107 transitions, 818 flow [2024-06-28 02:24:04,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=818, PETRI_PLACES=149, PETRI_TRANSITIONS=107} [2024-06-28 02:24:04,539 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-28 02:24:04,540 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 107 transitions, 818 flow [2024-06-28 02:24:04,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:04,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:04,540 INFO 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] [2024-06-28 02:24:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 02:24:04,540 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)] === [2024-06-28 02:24:04,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash -726767457, now seen corresponding path program 9 times [2024-06-28 02:24:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:04,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545510047] [2024-06-28 02:24:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:04,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:04,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545510047] [2024-06-28 02:24:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545510047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:04,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922667358] [2024-06-28 02:24:04,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:04,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:04,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:04,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:04,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:04,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 107 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:04,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:04,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:04,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:04,938 INFO L124 PetriNetUnfolderBase]: 1088/1879 cut-off events. [2024-06-28 02:24:04,939 INFO L125 PetriNetUnfolderBase]: For 70672/70673 co-relation queries the response was YES. [2024-06-28 02:24:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 1879 events. 1088/1879 cut-off events. For 70672/70673 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10782 event pairs, 321 based on Foata normal form. 19/1896 useless extension candidates. Maximal degree in co-relation 8918. Up to 1050 conditions per place. [2024-06-28 02:24:04,950 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 103 selfloop transitions, 29 changer transitions 15/154 dead transitions. [2024-06-28 02:24:04,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1442 flow [2024-06-28 02:24:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:24:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:24:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-28 02:24:04,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534188034188035 [2024-06-28 02:24:04,951 INFO L175 Difference]: Start difference. First operand has 149 places, 107 transitions, 818 flow. Second operand 12 states and 259 transitions. [2024-06-28 02:24:04,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1442 flow [2024-06-28 02:24:05,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1368 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:05,025 INFO L231 Difference]: Finished difference. Result has 143 places, 105 transitions, 807 flow [2024-06-28 02:24:05,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=807, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2024-06-28 02:24:05,025 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-28 02:24:05,025 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 807 flow [2024-06-28 02:24:05,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:05,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:05,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:05,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 02:24:05,026 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)] === [2024-06-28 02:24:05,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -715458953, now seen corresponding path program 10 times [2024-06-28 02:24:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292435001] [2024-06-28 02:24:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:05,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292435001] [2024-06-28 02:24:05,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292435001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:05,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:05,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:05,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466380967] [2024-06-28 02:24:05,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:05,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:05,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:05,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:05,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 807 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:05,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:05,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:05,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:05,388 INFO L124 PetriNetUnfolderBase]: 956/1649 cut-off events. [2024-06-28 02:24:05,389 INFO L125 PetriNetUnfolderBase]: For 48770/48771 co-relation queries the response was YES. [2024-06-28 02:24:05,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7454 conditions, 1649 events. 956/1649 cut-off events. For 48770/48771 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9182 event pairs, 317 based on Foata normal form. 19/1666 useless extension candidates. Maximal degree in co-relation 7392. Up to 1050 conditions per place. [2024-06-28 02:24:05,396 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 26 changer transitions 18/138 dead transitions. [2024-06-28 02:24:05,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 138 transitions, 1261 flow [2024-06-28 02:24:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-28 02:24:05,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-28 02:24:05,397 INFO L175 Difference]: Start difference. First operand has 143 places, 105 transitions, 807 flow. Second operand 10 states and 215 transitions. [2024-06-28 02:24:05,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 138 transitions, 1261 flow [2024-06-28 02:24:05,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 1196 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:05,445 INFO L231 Difference]: Finished difference. Result has 140 places, 102 transitions, 783 flow [2024-06-28 02:24:05,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=783, PETRI_PLACES=140, PETRI_TRANSITIONS=102} [2024-06-28 02:24:05,446 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-28 02:24:05,446 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 102 transitions, 783 flow [2024-06-28 02:24:05,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:05,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:05,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:05,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 02:24:05,446 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)] === [2024-06-28 02:24:05,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:05,446 INFO L85 PathProgramCache]: Analyzing trace with hash -877758099, now seen corresponding path program 11 times [2024-06-28 02:24:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:05,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105680258] [2024-06-28 02:24:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:05,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:05,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:05,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105680258] [2024-06-28 02:24:05,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105680258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:05,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:05,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518711938] [2024-06-28 02:24:05,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:05,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:05,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:05,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:05,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 102 transitions, 783 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:05,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:05,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:05,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:05,744 INFO L124 PetriNetUnfolderBase]: 1093/1877 cut-off events. [2024-06-28 02:24:05,744 INFO L125 PetriNetUnfolderBase]: For 61868/61868 co-relation queries the response was YES. [2024-06-28 02:24:05,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 1877 events. 1093/1877 cut-off events. For 61868/61868 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10817 event pairs, 288 based on Foata normal form. 18/1892 useless extension candidates. Maximal degree in co-relation 8903. Up to 849 conditions per place. [2024-06-28 02:24:05,754 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 76 selfloop transitions, 27 changer transitions 22/132 dead transitions. [2024-06-28 02:24:05,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1230 flow [2024-06-28 02:24:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-28 02:24:05,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-28 02:24:05,755 INFO L175 Difference]: Start difference. First operand has 140 places, 102 transitions, 783 flow. Second operand 8 states and 178 transitions. [2024-06-28 02:24:05,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1230 flow [2024-06-28 02:24:05,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 132 transitions, 1166 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:05,813 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 745 flow [2024-06-28 02:24:05,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=745, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2024-06-28 02:24:05,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-28 02:24:05,813 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 745 flow [2024-06-28 02:24:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:05,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 02:24:05,814 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)] === [2024-06-28 02:24:05,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1264797321, now seen corresponding path program 12 times [2024-06-28 02:24:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084064285] [2024-06-28 02:24:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:05,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:05,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084064285] [2024-06-28 02:24:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084064285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:05,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:05,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740201195] [2024-06-28 02:24:05,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:05,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:05,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:05,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:05,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:05,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:05,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 745 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:05,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:05,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:05,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:06,140 INFO L124 PetriNetUnfolderBase]: 951/1608 cut-off events. [2024-06-28 02:24:06,140 INFO L125 PetriNetUnfolderBase]: For 46701/46701 co-relation queries the response was YES. [2024-06-28 02:24:06,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7258 conditions, 1608 events. 951/1608 cut-off events. For 46701/46701 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8885 event pairs, 384 based on Foata normal form. 26/1634 useless extension candidates. Maximal degree in co-relation 7199. Up to 1337 conditions per place. [2024-06-28 02:24:06,150 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 69 selfloop transitions, 23 changer transitions 12/111 dead transitions. [2024-06-28 02:24:06,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 111 transitions, 1005 flow [2024-06-28 02:24:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-28 02:24:06,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-28 02:24:06,151 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 745 flow. Second operand 10 states and 197 transitions. [2024-06-28 02:24:06,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 111 transitions, 1005 flow [2024-06-28 02:24:06,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 111 transitions, 938 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:06,181 INFO L231 Difference]: Finished difference. Result has 126 places, 93 transitions, 698 flow [2024-06-28 02:24:06,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2024-06-28 02:24:06,181 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-28 02:24:06,181 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 698 flow [2024-06-28 02:24:06,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:06,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:06,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:06,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 02:24:06,182 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)] === [2024-06-28 02:24:06,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash 57430817, now seen corresponding path program 6 times [2024-06-28 02:24:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:06,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778987702] [2024-06-28 02:24:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:06,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:06,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:06,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778987702] [2024-06-28 02:24:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778987702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:06,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:06,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167475359] [2024-06-28 02:24:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:06,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:06,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:06,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:06,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:06,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:06,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:06,480 INFO L124 PetriNetUnfolderBase]: 757/1286 cut-off events. [2024-06-28 02:24:06,480 INFO L125 PetriNetUnfolderBase]: For 24830/24830 co-relation queries the response was YES. [2024-06-28 02:24:06,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1286 events. 757/1286 cut-off events. For 24830/24830 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6739 event pairs, 283 based on Foata normal form. 26/1312 useless extension candidates. Maximal degree in co-relation 5121. Up to 1030 conditions per place. [2024-06-28 02:24:06,487 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 68 selfloop transitions, 19 changer transitions 12/106 dead transitions. [2024-06-28 02:24:06,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 946 flow [2024-06-28 02:24:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 02:24:06,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071225071225072 [2024-06-28 02:24:06,487 INFO L175 Difference]: Start difference. First operand has 126 places, 93 transitions, 698 flow. Second operand 9 states and 178 transitions. [2024-06-28 02:24:06,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 946 flow [2024-06-28 02:24:06,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 896 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:06,508 INFO L231 Difference]: Finished difference. Result has 123 places, 89 transitions, 661 flow [2024-06-28 02:24:06,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=123, PETRI_TRANSITIONS=89} [2024-06-28 02:24:06,508 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-06-28 02:24:06,508 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 89 transitions, 661 flow [2024-06-28 02:24:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:06,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:06,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 02:24:06,509 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)] === [2024-06-28 02:24:06,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash 63151247, now seen corresponding path program 7 times [2024-06-28 02:24:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307181022] [2024-06-28 02:24:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:06,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:06,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307181022] [2024-06-28 02:24:06,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307181022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:06,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:06,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:06,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681419721] [2024-06-28 02:24:06,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:06,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:06,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:06,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:06,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 89 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:06,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:06,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:06,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:06,799 INFO L124 PetriNetUnfolderBase]: 742/1281 cut-off events. [2024-06-28 02:24:06,799 INFO L125 PetriNetUnfolderBase]: For 22233/22233 co-relation queries the response was YES. [2024-06-28 02:24:06,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5052 conditions, 1281 events. 742/1281 cut-off events. For 22233/22233 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6787 event pairs, 245 based on Foata normal form. 24/1305 useless extension candidates. Maximal degree in co-relation 4999. Up to 982 conditions per place. [2024-06-28 02:24:06,806 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 66 selfloop transitions, 16 changer transitions 17/106 dead transitions. [2024-06-28 02:24:06,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 106 transitions, 933 flow [2024-06-28 02:24:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 02:24:06,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-28 02:24:06,807 INFO L175 Difference]: Start difference. First operand has 123 places, 89 transitions, 661 flow. Second operand 9 states and 179 transitions. [2024-06-28 02:24:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 106 transitions, 933 flow [2024-06-28 02:24:06,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 106 transitions, 891 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:06,829 INFO L231 Difference]: Finished difference. Result has 121 places, 85 transitions, 621 flow [2024-06-28 02:24:06,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=621, PETRI_PLACES=121, PETRI_TRANSITIONS=85} [2024-06-28 02:24:06,829 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2024-06-28 02:24:06,829 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 85 transitions, 621 flow [2024-06-28 02:24:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:06,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:06,830 INFO 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] [2024-06-28 02:24:06,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 02:24:06,830 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)] === [2024-06-28 02:24:06,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:06,830 INFO L85 PathProgramCache]: Analyzing trace with hash 52247927, now seen corresponding path program 8 times [2024-06-28 02:24:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:06,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414375659] [2024-06-28 02:24:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:06,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:06,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:06,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414375659] [2024-06-28 02:24:06,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414375659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:06,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:06,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807105786] [2024-06-28 02:24:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:06,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:06,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:06,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:06,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 85 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:06,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:06,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:06,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:07,132 INFO L124 PetriNetUnfolderBase]: 709/1222 cut-off events. [2024-06-28 02:24:07,132 INFO L125 PetriNetUnfolderBase]: For 21017/21017 co-relation queries the response was YES. [2024-06-28 02:24:07,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 1222 events. 709/1222 cut-off events. For 21017/21017 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6432 event pairs, 225 based on Foata normal form. 24/1246 useless extension candidates. Maximal degree in co-relation 4765. Up to 902 conditions per place. [2024-06-28 02:24:07,138 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 69 selfloop transitions, 14 changer transitions 11/101 dead transitions. [2024-06-28 02:24:07,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 101 transitions, 881 flow [2024-06-28 02:24:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 02:24:07,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-28 02:24:07,139 INFO L175 Difference]: Start difference. First operand has 121 places, 85 transitions, 621 flow. Second operand 8 states and 162 transitions. [2024-06-28 02:24:07,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 101 transitions, 881 flow [2024-06-28 02:24:07,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 101 transitions, 843 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:07,157 INFO L231 Difference]: Finished difference. Result has 116 places, 81 transitions, 579 flow [2024-06-28 02:24:07,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=116, PETRI_TRANSITIONS=81} [2024-06-28 02:24:07,157 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 76 predicate places. [2024-06-28 02:24:07,157 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 81 transitions, 579 flow [2024-06-28 02:24:07,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:07,158 INFO 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] [2024-06-28 02:24:07,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 02:24:07,158 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)] === [2024-06-28 02:24:07,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash 63353057, now seen corresponding path program 9 times [2024-06-28 02:24:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:07,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211114629] [2024-06-28 02:24:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:07,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:07,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211114629] [2024-06-28 02:24:07,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211114629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:07,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:07,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:07,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392736] [2024-06-28 02:24:07,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:07,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:07,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:07,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:07,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:07,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:07,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 81 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:07,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:07,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:07,446 INFO L124 PetriNetUnfolderBase]: 757/1314 cut-off events. [2024-06-28 02:24:07,446 INFO L125 PetriNetUnfolderBase]: For 22353/22353 co-relation queries the response was YES. [2024-06-28 02:24:07,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5427 conditions, 1314 events. 757/1314 cut-off events. For 22353/22353 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7096 event pairs, 217 based on Foata normal form. 18/1332 useless extension candidates. Maximal degree in co-relation 5377. Up to 826 conditions per place. [2024-06-28 02:24:07,453 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 72 selfloop transitions, 17 changer transitions 8/104 dead transitions. [2024-06-28 02:24:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 104 transitions, 920 flow [2024-06-28 02:24:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 02:24:07,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-28 02:24:07,454 INFO L175 Difference]: Start difference. First operand has 116 places, 81 transitions, 579 flow. Second operand 9 states and 184 transitions. [2024-06-28 02:24:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 104 transitions, 920 flow [2024-06-28 02:24:07,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 877 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:07,472 INFO L231 Difference]: Finished difference. Result has 115 places, 80 transitions, 571 flow [2024-06-28 02:24:07,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=115, PETRI_TRANSITIONS=80} [2024-06-28 02:24:07,472 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-28 02:24:07,472 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 80 transitions, 571 flow [2024-06-28 02:24:07,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:07,473 INFO 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] [2024-06-28 02:24:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 02:24:07,473 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)] === [2024-06-28 02:24:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1265840131, now seen corresponding path program 10 times [2024-06-28 02:24:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387749582] [2024-06-28 02:24:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:07,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:07,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387749582] [2024-06-28 02:24:07,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387749582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:07,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:07,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:07,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104924822] [2024-06-28 02:24:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:07,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:07,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:07,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:07,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 80 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:07,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:07,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:07,748 INFO L124 PetriNetUnfolderBase]: 652/1129 cut-off events. [2024-06-28 02:24:07,748 INFO L125 PetriNetUnfolderBase]: For 16493/16493 co-relation queries the response was YES. [2024-06-28 02:24:07,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 1129 events. 652/1129 cut-off events. For 16493/16493 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5841 event pairs, 195 based on Foata normal form. 18/1147 useless extension candidates. Maximal degree in co-relation 4407. Up to 826 conditions per place. [2024-06-28 02:24:07,754 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 66 selfloop transitions, 15 changer transitions 11/99 dead transitions. [2024-06-28 02:24:07,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 99 transitions, 833 flow [2024-06-28 02:24:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 02:24:07,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156695156695157 [2024-06-28 02:24:07,755 INFO L175 Difference]: Start difference. First operand has 115 places, 80 transitions, 571 flow. Second operand 9 states and 181 transitions. [2024-06-28 02:24:07,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 99 transitions, 833 flow [2024-06-28 02:24:07,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 795 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:07,770 INFO L231 Difference]: Finished difference. Result has 115 places, 75 transitions, 528 flow [2024-06-28 02:24:07,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=75} [2024-06-28 02:24:07,771 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-28 02:24:07,771 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 75 transitions, 528 flow [2024-06-28 02:24:07,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:07,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:07,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 02:24:07,772 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)] === [2024-06-28 02:24:07,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -9041131, now seen corresponding path program 11 times [2024-06-28 02:24:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:07,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095739561] [2024-06-28 02:24:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:07,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095739561] [2024-06-28 02:24:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095739561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:07,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:07,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794787679] [2024-06-28 02:24:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:07,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:07,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 75 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:07,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:07,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:08,096 INFO L124 PetriNetUnfolderBase]: 724/1261 cut-off events. [2024-06-28 02:24:08,096 INFO L125 PetriNetUnfolderBase]: For 22053/22053 co-relation queries the response was YES. [2024-06-28 02:24:08,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5246 conditions, 1261 events. 724/1261 cut-off events. For 22053/22053 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6740 event pairs, 100 based on Foata normal form. 18/1279 useless extension candidates. Maximal degree in co-relation 5197. Up to 734 conditions per place. [2024-06-28 02:24:08,102 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 70 selfloop transitions, 22 changer transitions 8/107 dead transitions. [2024-06-28 02:24:08,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 107 transitions, 909 flow [2024-06-28 02:24:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:24:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:24:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-28 02:24:08,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2024-06-28 02:24:08,102 INFO L175 Difference]: Start difference. First operand has 115 places, 75 transitions, 528 flow. Second operand 11 states and 224 transitions. [2024-06-28 02:24:08,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 107 transitions, 909 flow [2024-06-28 02:24:08,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 855 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-28 02:24:08,120 INFO L231 Difference]: Finished difference. Result has 112 places, 74 transitions, 518 flow [2024-06-28 02:24:08,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=518, PETRI_PLACES=112, PETRI_TRANSITIONS=74} [2024-06-28 02:24:08,120 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-28 02:24:08,120 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 74 transitions, 518 flow [2024-06-28 02:24:08,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:08,120 INFO 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] [2024-06-28 02:24:08,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 02:24:08,121 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)] === [2024-06-28 02:24:08,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1633105389, now seen corresponding path program 12 times [2024-06-28 02:24:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695683159] [2024-06-28 02:24:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:08,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:08,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695683159] [2024-06-28 02:24:08,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695683159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:08,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:08,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:08,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479842317] [2024-06-28 02:24:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:08,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:08,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:08,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:08,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 74 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:08,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:08,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:08,412 INFO L124 PetriNetUnfolderBase]: 619/1074 cut-off events. [2024-06-28 02:24:08,412 INFO L125 PetriNetUnfolderBase]: For 15981/15981 co-relation queries the response was YES. [2024-06-28 02:24:08,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 1074 events. 619/1074 cut-off events. For 15981/15981 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5462 event pairs, 88 based on Foata normal form. 18/1092 useless extension candidates. Maximal degree in co-relation 4223. Up to 734 conditions per place. [2024-06-28 02:24:08,416 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 58 selfloop transitions, 18 changer transitions 13/96 dead transitions. [2024-06-28 02:24:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 96 transitions, 788 flow [2024-06-28 02:24:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 02:24:08,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270655270655271 [2024-06-28 02:24:08,417 INFO L175 Difference]: Start difference. First operand has 112 places, 74 transitions, 518 flow. Second operand 9 states and 185 transitions. [2024-06-28 02:24:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 96 transitions, 788 flow [2024-06-28 02:24:08,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 96 transitions, 740 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:08,429 INFO L231 Difference]: Finished difference. Result has 110 places, 71 transitions, 485 flow [2024-06-28 02:24:08,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=110, PETRI_TRANSITIONS=71} [2024-06-28 02:24:08,430 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-28 02:24:08,430 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 71 transitions, 485 flow [2024-06-28 02:24:08,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:08,430 INFO 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] [2024-06-28 02:24:08,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 02:24:08,430 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)] === [2024-06-28 02:24:08,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1632903579, now seen corresponding path program 13 times [2024-06-28 02:24:08,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:08,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339165933] [2024-06-28 02:24:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:08,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:08,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:08,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339165933] [2024-06-28 02:24:08,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339165933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:08,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:08,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890360543] [2024-06-28 02:24:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:08,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:08,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 71 transitions, 485 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:08,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:08,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:08,666 INFO L124 PetriNetUnfolderBase]: 611/1058 cut-off events. [2024-06-28 02:24:08,666 INFO L125 PetriNetUnfolderBase]: For 15942/15942 co-relation queries the response was YES. [2024-06-28 02:24:08,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 1058 events. 611/1058 cut-off events. For 15942/15942 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5340 event pairs, 81 based on Foata normal form. 18/1074 useless extension candidates. Maximal degree in co-relation 4131. Up to 698 conditions per place. [2024-06-28 02:24:08,671 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 52 selfloop transitions, 13 changer transitions 21/93 dead transitions. [2024-06-28 02:24:08,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 752 flow [2024-06-28 02:24:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 02:24:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-28 02:24:08,672 INFO L175 Difference]: Start difference. First operand has 110 places, 71 transitions, 485 flow. Second operand 8 states and 167 transitions. [2024-06-28 02:24:08,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 752 flow [2024-06-28 02:24:08,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 706 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:08,686 INFO L231 Difference]: Finished difference. Result has 105 places, 65 transitions, 427 flow [2024-06-28 02:24:08,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=105, PETRI_TRANSITIONS=65} [2024-06-28 02:24:08,687 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-28 02:24:08,687 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 65 transitions, 427 flow [2024-06-28 02:24:08,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:08,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:08,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 02:24:08,687 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)] === [2024-06-28 02:24:08,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 833172113, now seen corresponding path program 14 times [2024-06-28 02:24:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730102046] [2024-06-28 02:24:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:08,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730102046] [2024-06-28 02:24:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730102046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304562017] [2024-06-28 02:24:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:08,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:08,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 65 transitions, 427 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:08,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:08,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:08,957 INFO L124 PetriNetUnfolderBase]: 692/1191 cut-off events. [2024-06-28 02:24:08,957 INFO L125 PetriNetUnfolderBase]: For 26106/26106 co-relation queries the response was YES. [2024-06-28 02:24:08,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1191 events. 692/1191 cut-off events. For 26106/26106 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6252 event pairs, 289 based on Foata normal form. 24/1215 useless extension candidates. Maximal degree in co-relation 5151. Up to 719 conditions per place. [2024-06-28 02:24:08,962 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 56 selfloop transitions, 13 changer transitions 10/86 dead transitions. [2024-06-28 02:24:08,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 86 transitions, 725 flow [2024-06-28 02:24:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-28 02:24:08,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-28 02:24:08,963 INFO L175 Difference]: Start difference. First operand has 105 places, 65 transitions, 427 flow. Second operand 10 states and 197 transitions. [2024-06-28 02:24:08,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 86 transitions, 725 flow [2024-06-28 02:24:08,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 661 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-28 02:24:08,976 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 374 flow [2024-06-28 02:24:08,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=374, PETRI_PLACES=99, PETRI_TRANSITIONS=62} [2024-06-28 02:24:08,976 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-28 02:24:08,976 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 374 flow [2024-06-28 02:24:08,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:08,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:08,976 INFO 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] [2024-06-28 02:24:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 02:24:08,976 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)] === [2024-06-28 02:24:08,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 794065867, now seen corresponding path program 15 times [2024-06-28 02:24:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:08,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069579599] [2024-06-28 02:24:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069579599] [2024-06-28 02:24:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069579599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:09,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:09,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346041909] [2024-06-28 02:24:09,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:09,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:09,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:09,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:09,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 62 transitions, 374 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:09,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:09,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:09,214 INFO L124 PetriNetUnfolderBase]: 802/1397 cut-off events. [2024-06-28 02:24:09,214 INFO L125 PetriNetUnfolderBase]: For 35532/35532 co-relation queries the response was YES. [2024-06-28 02:24:09,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 1397 events. 802/1397 cut-off events. For 35532/35532 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7829 event pairs, 346 based on Foata normal form. 18/1415 useless extension candidates. Maximal degree in co-relation 6479. Up to 527 conditions per place. [2024-06-28 02:24:09,220 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 57 selfloop transitions, 13 changer transitions 13/90 dead transitions. [2024-06-28 02:24:09,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 90 transitions, 752 flow [2024-06-28 02:24:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-28 02:24:09,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2024-06-28 02:24:09,221 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 374 flow. Second operand 10 states and 206 transitions. [2024-06-28 02:24:09,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 90 transitions, 752 flow [2024-06-28 02:24:09,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 90 transitions, 717 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:09,237 INFO L231 Difference]: Finished difference. Result has 98 places, 59 transitions, 360 flow [2024-06-28 02:24:09,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=360, PETRI_PLACES=98, PETRI_TRANSITIONS=59} [2024-06-28 02:24:09,238 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-06-28 02:24:09,238 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 59 transitions, 360 flow [2024-06-28 02:24:09,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:09,238 INFO 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] [2024-06-28 02:24:09,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 02:24:09,238 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)] === [2024-06-28 02:24:09,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash 68978935, now seen corresponding path program 16 times [2024-06-28 02:24:09,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:09,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646859475] [2024-06-28 02:24:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:09,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:09,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646859475] [2024-06-28 02:24:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646859475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:09,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:09,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943665988] [2024-06-28 02:24:09,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:09,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:09,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:09,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:09,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 59 transitions, 360 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:09,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:09,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:09,486 INFO L124 PetriNetUnfolderBase]: 659/1148 cut-off events. [2024-06-28 02:24:09,486 INFO L125 PetriNetUnfolderBase]: For 27356/27356 co-relation queries the response was YES. [2024-06-28 02:24:09,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5082 conditions, 1148 events. 659/1148 cut-off events. For 27356/27356 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6083 event pairs, 374 based on Foata normal form. 26/1174 useless extension candidates. Maximal degree in co-relation 5041. Up to 921 conditions per place. [2024-06-28 02:24:09,491 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 43 selfloop transitions, 8 changer transitions 14/72 dead transitions. [2024-06-28 02:24:09,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 72 transitions, 540 flow [2024-06-28 02:24:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 02:24:09,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-28 02:24:09,492 INFO L175 Difference]: Start difference. First operand has 98 places, 59 transitions, 360 flow. Second operand 9 states and 172 transitions. [2024-06-28 02:24:09,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 72 transitions, 540 flow [2024-06-28 02:24:09,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 72 transitions, 510 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:09,506 INFO L231 Difference]: Finished difference. Result has 94 places, 54 transitions, 315 flow [2024-06-28 02:24:09,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=94, PETRI_TRANSITIONS=54} [2024-06-28 02:24:09,506 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-28 02:24:09,506 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 54 transitions, 315 flow [2024-06-28 02:24:09,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:09,506 INFO 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] [2024-06-28 02:24:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 02:24:09,506 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)] === [2024-06-28 02:24:09,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1909175903, now seen corresponding path program 17 times [2024-06-28 02:24:09,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:09,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747337403] [2024-06-28 02:24:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747337403] [2024-06-28 02:24:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747337403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:09,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:09,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:09,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090951284] [2024-06-28 02:24:09,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:09,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:09,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:09,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:09,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 54 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:09,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:09,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:09,769 INFO L124 PetriNetUnfolderBase]: 542/963 cut-off events. [2024-06-28 02:24:09,769 INFO L125 PetriNetUnfolderBase]: For 16324/16324 co-relation queries the response was YES. [2024-06-28 02:24:09,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 963 events. 542/963 cut-off events. For 16324/16324 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4904 event pairs, 186 based on Foata normal form. 18/981 useless extension candidates. Maximal degree in co-relation 3871. Up to 568 conditions per place. [2024-06-28 02:24:09,773 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 54 selfloop transitions, 9 changer transitions 12/82 dead transitions. [2024-06-28 02:24:09,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 82 transitions, 613 flow [2024-06-28 02:24:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:24:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:24:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-28 02:24:09,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-28 02:24:09,774 INFO L175 Difference]: Start difference. First operand has 94 places, 54 transitions, 315 flow. Second operand 11 states and 213 transitions. [2024-06-28 02:24:09,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 82 transitions, 613 flow [2024-06-28 02:24:09,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 560 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:09,781 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 289 flow [2024-06-28 02:24:09,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2024-06-28 02:24:09,782 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-28 02:24:09,782 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 289 flow [2024-06-28 02:24:09,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:09,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:09,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 02:24:09,782 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)] === [2024-06-28 02:24:09,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1064905181, now seen corresponding path program 18 times [2024-06-28 02:24:09,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:09,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302102810] [2024-06-28 02:24:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:09,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:09,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302102810] [2024-06-28 02:24:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302102810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:09,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881878734] [2024-06-28 02:24:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:09,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:09,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 289 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:09,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:09,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:09,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:10,008 INFO L124 PetriNetUnfolderBase]: 437/776 cut-off events. [2024-06-28 02:24:10,008 INFO L125 PetriNetUnfolderBase]: For 9436/9436 co-relation queries the response was YES. [2024-06-28 02:24:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 776 events. 437/776 cut-off events. For 9436/9436 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3689 event pairs, 174 based on Foata normal form. 18/794 useless extension candidates. Maximal degree in co-relation 2739. Up to 568 conditions per place. [2024-06-28 02:24:10,011 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 39 selfloop transitions, 5 changer transitions 18/69 dead transitions. [2024-06-28 02:24:10,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 69 transitions, 465 flow [2024-06-28 02:24:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 02:24:10,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-28 02:24:10,012 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 289 flow. Second operand 9 states and 172 transitions. [2024-06-28 02:24:10,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 69 transitions, 465 flow [2024-06-28 02:24:10,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 69 transitions, 444 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:10,017 INFO L231 Difference]: Finished difference. Result has 86 places, 48 transitions, 257 flow [2024-06-28 02:24:10,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=86, PETRI_TRANSITIONS=48} [2024-06-28 02:24:10,017 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-28 02:24:10,017 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 48 transitions, 257 flow [2024-06-28 02:24:10,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:10,017 INFO 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] [2024-06-28 02:24:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 02:24:10,018 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)] === [2024-06-28 02:24:10,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2091878547, now seen corresponding path program 19 times [2024-06-28 02:24:10,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:10,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815483780] [2024-06-28 02:24:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:10,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:10,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815483780] [2024-06-28 02:24:10,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815483780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:10,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:10,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864300161] [2024-06-28 02:24:10,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:10,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:10,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 48 transitions, 257 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:10,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:10,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:10,259 INFO L124 PetriNetUnfolderBase]: 394/699 cut-off events. [2024-06-28 02:24:10,259 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2024-06-28 02:24:10,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 699 events. 394/699 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3228 event pairs, 145 based on Foata normal form. 24/723 useless extension candidates. Maximal degree in co-relation 2353. Up to 422 conditions per place. [2024-06-28 02:24:10,262 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 33 selfloop transitions, 3 changer transitions 25/68 dead transitions. [2024-06-28 02:24:10,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 68 transitions, 455 flow [2024-06-28 02:24:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 02:24:10,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985754985754986 [2024-06-28 02:24:10,263 INFO L175 Difference]: Start difference. First operand has 86 places, 48 transitions, 257 flow. Second operand 9 states and 175 transitions. [2024-06-28 02:24:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 68 transitions, 455 flow [2024-06-28 02:24:10,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 439 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:24:10,267 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 205 flow [2024-06-28 02:24:10,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=41} [2024-06-28 02:24:10,267 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-06-28 02:24:10,267 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 205 flow [2024-06-28 02:24:10,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:10,267 INFO 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] [2024-06-28 02:24:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 02:24:10,268 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)] === [2024-06-28 02:24:10,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1683908181, now seen corresponding path program 20 times [2024-06-28 02:24:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881844720] [2024-06-28 02:24:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881844720] [2024-06-28 02:24:10,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881844720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:10,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715563934] [2024-06-28 02:24:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:10,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:10,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:10,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 41 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:10,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:10,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:10,491 INFO L124 PetriNetUnfolderBase]: 393/709 cut-off events. [2024-06-28 02:24:10,491 INFO L125 PetriNetUnfolderBase]: For 8652/8652 co-relation queries the response was YES. [2024-06-28 02:24:10,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 709 events. 393/709 cut-off events. For 8652/8652 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3381 event pairs, 71 based on Foata normal form. 18/726 useless extension candidates. Maximal degree in co-relation 2576. Up to 204 conditions per place. [2024-06-28 02:24:10,493 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 39 selfloop transitions, 12 changer transitions 13/71 dead transitions. [2024-06-28 02:24:10,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 469 flow [2024-06-28 02:24:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:24:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:24:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-28 02:24:10,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-28 02:24:10,494 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 205 flow. Second operand 10 states and 200 transitions. [2024-06-28 02:24:10,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 469 flow [2024-06-28 02:24:10,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 441 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:10,497 INFO L231 Difference]: Finished difference. Result has 71 places, 38 transitions, 196 flow [2024-06-28 02:24:10,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=38} [2024-06-28 02:24:10,497 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-28 02:24:10,498 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 38 transitions, 196 flow [2024-06-28 02:24:10,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:10,498 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] [2024-06-28 02:24:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 02:24:10,498 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)] === [2024-06-28 02:24:10,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1404189357, now seen corresponding path program 21 times [2024-06-28 02:24:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325206003] [2024-06-28 02:24:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:10,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325206003] [2024-06-28 02:24:10,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325206003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:10,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:10,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813751771] [2024-06-28 02:24:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:10,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:10,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:10,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 38 transitions, 196 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:10,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:10,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:10,767 INFO L124 PetriNetUnfolderBase]: 450/813 cut-off events. [2024-06-28 02:24:10,767 INFO L125 PetriNetUnfolderBase]: For 7120/7120 co-relation queries the response was YES. [2024-06-28 02:24:10,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3033 conditions, 813 events. 450/813 cut-off events. For 7120/7120 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4097 event pairs, 110 based on Foata normal form. 18/831 useless extension candidates. Maximal degree in co-relation 3005. Up to 387 conditions per place. [2024-06-28 02:24:10,769 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 41 selfloop transitions, 12 changer transitions 12/72 dead transitions. [2024-06-28 02:24:10,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 467 flow [2024-06-28 02:24:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:24:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:24:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-28 02:24:10,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2024-06-28 02:24:10,770 INFO L175 Difference]: Start difference. First operand has 71 places, 38 transitions, 196 flow. Second operand 12 states and 233 transitions. [2024-06-28 02:24:10,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 467 flow [2024-06-28 02:24:10,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 423 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:10,773 INFO L231 Difference]: Finished difference. Result has 70 places, 37 transitions, 190 flow [2024-06-28 02:24:10,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=190, PETRI_PLACES=70, PETRI_TRANSITIONS=37} [2024-06-28 02:24:10,773 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-06-28 02:24:10,773 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 37 transitions, 190 flow [2024-06-28 02:24:10,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:10,774 INFO 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] [2024-06-28 02:24:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 02:24:10,774 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)] === [2024-06-28 02:24:10,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash 878632425, now seen corresponding path program 22 times [2024-06-28 02:24:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:10,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652200996] [2024-06-28 02:24:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:10,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:10,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652200996] [2024-06-28 02:24:10,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652200996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308214770] [2024-06-28 02:24:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:10,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:10,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:10,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 37 transitions, 190 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:10,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:10,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:11,049 INFO L124 PetriNetUnfolderBase]: 426/781 cut-off events. [2024-06-28 02:24:11,049 INFO L125 PetriNetUnfolderBase]: For 5076/5076 co-relation queries the response was YES. [2024-06-28 02:24:11,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 781 events. 426/781 cut-off events. For 5076/5076 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4014 event pairs, 82 based on Foata normal form. 18/799 useless extension candidates. Maximal degree in co-relation 2747. Up to 351 conditions per place. [2024-06-28 02:24:11,052 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 11 changer transitions 8/66 dead transitions. [2024-06-28 02:24:11,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 416 flow [2024-06-28 02:24:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:24:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:24:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-28 02:24:11,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-28 02:24:11,053 INFO L175 Difference]: Start difference. First operand has 70 places, 37 transitions, 190 flow. Second operand 11 states and 213 transitions. [2024-06-28 02:24:11,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 416 flow [2024-06-28 02:24:11,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 387 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-28 02:24:11,055 INFO L231 Difference]: Finished difference. Result has 69 places, 35 transitions, 178 flow [2024-06-28 02:24:11,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=178, PETRI_PLACES=69, PETRI_TRANSITIONS=35} [2024-06-28 02:24:11,056 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2024-06-28 02:24:11,056 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 35 transitions, 178 flow [2024-06-28 02:24:11,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:11,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:11,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 02:24:11,057 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)] === [2024-06-28 02:24:11,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1559041631, now seen corresponding path program 23 times [2024-06-28 02:24:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:11,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399905610] [2024-06-28 02:24:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399905610] [2024-06-28 02:24:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399905610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262714729] [2024-06-28 02:24:11,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:11,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:11,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:11,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 35 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:11,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:11,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:11,288 INFO L124 PetriNetUnfolderBase]: 321/590 cut-off events. [2024-06-28 02:24:11,288 INFO L125 PetriNetUnfolderBase]: For 3306/3306 co-relation queries the response was YES. [2024-06-28 02:24:11,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 590 events. 321/590 cut-off events. For 3306/3306 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2763 event pairs, 106 based on Foata normal form. 18/608 useless extension candidates. Maximal degree in co-relation 2017. Up to 375 conditions per place. [2024-06-28 02:24:11,290 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 24 selfloop transitions, 6 changer transitions 16/53 dead transitions. [2024-06-28 02:24:11,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 53 transitions, 320 flow [2024-06-28 02:24:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 02:24:11,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-28 02:24:11,290 INFO L175 Difference]: Start difference. First operand has 69 places, 35 transitions, 178 flow. Second operand 9 states and 172 transitions. [2024-06-28 02:24:11,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 53 transitions, 320 flow [2024-06-28 02:24:11,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 289 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-28 02:24:11,292 INFO L231 Difference]: Finished difference. Result has 65 places, 31 transitions, 141 flow [2024-06-28 02:24:11,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=141, PETRI_PLACES=65, PETRI_TRANSITIONS=31} [2024-06-28 02:24:11,292 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2024-06-28 02:24:11,292 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 31 transitions, 141 flow [2024-06-28 02:24:11,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:11,292 INFO 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] [2024-06-28 02:24:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 02:24:11,293 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)] === [2024-06-28 02:24:11,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1536091191, now seen corresponding path program 24 times [2024-06-28 02:24:11,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:11,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317395064] [2024-06-28 02:24:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:11,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:11,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317395064] [2024-06-28 02:24:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317395064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:11,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:11,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603390403] [2024-06-28 02:24:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:11,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:11,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:11,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:11,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 31 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:11,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:11,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:11,498 INFO L124 PetriNetUnfolderBase]: 208/395 cut-off events. [2024-06-28 02:24:11,498 INFO L125 PetriNetUnfolderBase]: For 1790/1790 co-relation queries the response was YES. [2024-06-28 02:24:11,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 395 events. 208/395 cut-off events. For 1790/1790 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1641 event pairs, 12 based on Foata normal form. 18/413 useless extension candidates. Maximal degree in co-relation 1227. Up to 147 conditions per place. [2024-06-28 02:24:11,499 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 25 selfloop transitions, 6 changer transitions 17/55 dead transitions. [2024-06-28 02:24:11,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 311 flow [2024-06-28 02:24:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:24:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:24:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 02:24:11,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731934731934732 [2024-06-28 02:24:11,500 INFO L175 Difference]: Start difference. First operand has 65 places, 31 transitions, 141 flow. Second operand 11 states and 203 transitions. [2024-06-28 02:24:11,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 311 flow [2024-06-28 02:24:11,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 297 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 02:24:11,501 INFO L231 Difference]: Finished difference. Result has 63 places, 28 transitions, 126 flow [2024-06-28 02:24:11,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=126, PETRI_PLACES=63, PETRI_TRANSITIONS=28} [2024-06-28 02:24:11,502 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-28 02:24:11,502 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 28 transitions, 126 flow [2024-06-28 02:24:11,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:11,502 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] [2024-06-28 02:24:11,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 02:24:11,503 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)] === [2024-06-28 02:24:11,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:11,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1539815841, now seen corresponding path program 25 times [2024-06-28 02:24:11,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:11,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117089230] [2024-06-28 02:24:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:11,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:11,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:11,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117089230] [2024-06-28 02:24:11,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117089230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:11,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:11,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:24:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963475102] [2024-06-28 02:24:11,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:11,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:24:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:24:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:24:11,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 02:24:11,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 28 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:11,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 02:24:11,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:11,731 INFO L124 PetriNetUnfolderBase]: 83/176 cut-off events. [2024-06-28 02:24:11,731 INFO L125 PetriNetUnfolderBase]: For 852/852 co-relation queries the response was YES. [2024-06-28 02:24:11,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 176 events. 83/176 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 514 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 501. Up to 96 conditions per place. [2024-06-28 02:24:11,732 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-28 02:24:11,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 198 flow [2024-06-28 02:24:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 02:24:11,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-06-28 02:24:11,732 INFO L175 Difference]: Start difference. First operand has 63 places, 28 transitions, 126 flow. Second operand 9 states and 159 transitions. [2024-06-28 02:24:11,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 198 flow [2024-06-28 02:24:11,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 171 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-28 02:24:11,733 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-28 02:24:11,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-28 02:24:11,733 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-06-28 02:24:11,733 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-28 02:24:11,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:11,735 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-28 02:24:11,736 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-28 02:24:11,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-28 02:24:11,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-28 02:24:11,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-28 02:24:11,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-28 02:24:11,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 02:24:11,741 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:11,743 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 02:24:11,743 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 02:24:11,746 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-28 02:24:11,746 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-28 02:24:11,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 02:24:11 BasicIcfg [2024-06-28 02:24:11,748 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 02:24:11,748 INFO L158 Benchmark]: Toolchain (without parser) took 81283.54ms. Allocated memory was 153.1MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 110.5MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 969.7MB. Max. memory is 16.1GB. [2024-06-28 02:24:11,748 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 153.1MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 02:24:11,749 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 02:24:11,749 INFO L158 Benchmark]: CACSL2BoogieTranslator took 422.22ms. Allocated memory is still 153.1MB. Free memory was 110.5MB in the beginning and 82.4MB in the end (delta: 28.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-28 02:24:11,749 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.36ms. Allocated memory is still 153.1MB. Free memory was 82.1MB in the beginning and 80.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 02:24:11,749 INFO L158 Benchmark]: Boogie Preprocessor took 108.84ms. Allocated memory is still 153.1MB. Free memory was 80.1MB in the beginning and 120.6MB in the end (delta: -40.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-06-28 02:24:11,749 INFO L158 Benchmark]: RCFGBuilder took 379.08ms. Allocated memory is still 153.1MB. Free memory was 120.6MB in the beginning and 95.0MB in the end (delta: 25.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-28 02:24:11,750 INFO L158 Benchmark]: TraceAbstraction took 80302.67ms. Allocated memory was 153.1MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 94.3MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 956.0MB. Max. memory is 16.1GB. [2024-06-28 02:24:11,750 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 0.16ms. Allocated memory is still 153.1MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 422.22ms. Allocated memory is still 153.1MB. Free memory was 110.5MB in the beginning and 82.4MB in the end (delta: 28.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.36ms. Allocated memory is still 153.1MB. Free memory was 82.1MB in the beginning and 80.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 108.84ms. Allocated memory is still 153.1MB. Free memory was 80.1MB in the beginning and 120.6MB in the end (delta: -40.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 379.08ms. Allocated memory is still 153.1MB. Free memory was 120.6MB in the beginning and 95.0MB in the end (delta: 25.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 80302.67ms. Allocated memory was 153.1MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 94.3MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 956.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: 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, 63 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: 80.2s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 68.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9297 SdHoareTripleChecker+Valid, 13.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7596 mSDsluCounter, 2792 SdHoareTripleChecker+Invalid, 11.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1861 mSDsCounter, 1365 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33385 IncrementalHoareTripleChecker+Invalid, 34750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1365 mSolverCounterUnsat, 931 mSDtfsCounter, 33385 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 999 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2218occurred in iteration=62, InterpolantAutomatonStates: 1055, 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, 0.2s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 2438 NumberOfCodeBlocks, 2438 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2305 ConstructedInterpolants, 0 QuantifiedInterpolants, 21757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 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! [2024-06-28 02:24:11,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE