./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:04:21,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:04:21,380 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:04:21,391 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:04:21,392 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:04:21,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:04:21,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:04:21,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:04:21,444 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:04:21,448 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:04:21,448 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:04:21,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:04:21,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:04:21,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:04:21,451 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:04:21,451 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:04:21,451 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:04:21,452 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:04:21,452 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:04:21,452 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:04:21,453 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:04:21,453 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:04:21,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:04:21,454 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:04:21,468 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:04:21,468 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:04:21,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:04:21,469 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:04:21,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:04:21,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:04:21,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:04:21,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:04:21,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:04:21,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:04:21,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:04:21,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:04:21,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:04:21,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:04:21,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:04:21,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:04:21,473 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:04:21,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:04:21,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:04:21,474 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:04:21,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:04:21,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:04:21,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:04:21,989 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:04:21,990 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:04:21,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-02-07 19:04:24,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:04:24,513 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:04:24,516 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-02-07 19:04:24,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d553444/8e4ea39b44dd42809343831a9a409b31/FLAG347a896c4 [2024-02-07 19:04:24,586 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d553444/8e4ea39b44dd42809343831a9a409b31 [2024-02-07 19:04:24,588 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:04:24,589 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:04:24,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-02-07 19:04:24,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:04:24,805 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:04:24,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:04:24,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:04:24,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:04:24,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:04:24" (1/2) ... [2024-02-07 19:04:24,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba4e389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:04:24, skipping insertion in model container [2024-02-07 19:04:24,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:04:24" (1/2) ... [2024-02-07 19:04:24,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@421df776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:04:24, skipping insertion in model container [2024-02-07 19:04:24,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:04:24" (2/2) ... [2024-02-07 19:04:24,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba4e389 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:24, skipping insertion in model container [2024-02-07 19:04:24,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:04:24" (2/2) ... [2024-02-07 19:04:24,833 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:04:25,013 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:04:25,014 INFO L76 edCorrectnessWitness]: Location invariant before [L750-L750] 0 <= __unbuffered_cnt [2024-02-07 19:04:25,015 INFO L76 edCorrectnessWitness]: Location invariant before [L765-L765] 0 <= __unbuffered_cnt [2024-02-07 19:04:25,015 INFO L76 edCorrectnessWitness]: Location invariant before [L760-L760] ((0 <= y) && (y <= 1)) && (y == 0 || y == 1) [2024-02-07 19:04:25,015 INFO L76 edCorrectnessWitness]: Location invariant before [L787-L787] 0 <= __unbuffered_cnt [2024-02-07 19:04:25,015 INFO L76 edCorrectnessWitness]: Location invariant before [L761-L761] ((0 <= __unbuffered_p2_EBX) && (__unbuffered_p2_EBX <= 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) [2024-02-07 19:04:25,015 INFO L76 edCorrectnessWitness]: Location invariant before [L735-L735] 0 <= __unbuffered_cnt [2024-02-07 19:04:25,015 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] y == 1 [2024-02-07 19:04:25,016 INFO L76 edCorrectnessWitness]: Location invariant before [L757-L757] (((0 <= x) && (x <= 2)) && (x <= 127)) && ((x == 0 || x == 1) || x == 2) [2024-02-07 19:04:25,016 INFO L76 edCorrectnessWitness]: Location invariant before [L751-L751] 1 <= __unbuffered_cnt [2024-02-07 19:04:25,016 INFO L76 edCorrectnessWitness]: Location invariant before [L743-L743] x == 1 [2024-02-07 19:04:25,016 INFO L76 edCorrectnessWitness]: Location invariant before [L731-L731] (((0 <= __unbuffered_p0_EAX) && (__unbuffered_p0_EAX <= 2)) && (__unbuffered_p0_EAX <= 127)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2) [2024-02-07 19:04:25,016 INFO L76 edCorrectnessWitness]: Location invariant before [L736-L736] 1 <= __unbuffered_cnt [2024-02-07 19:04:25,017 INFO L76 edCorrectnessWitness]: Location invariant before [L789-L789] main$tmp_guard0 == (_Bool)0 || main$tmp_guard0 == (_Bool)1 [2024-02-07 19:04:25,017 INFO L76 edCorrectnessWitness]: Location invariant before [L795-L795] main$tmp_guard1 == (_Bool)0 || main$tmp_guard1 == (_Bool)1 [2024-02-07 19:04:25,017 INFO L76 edCorrectnessWitness]: Location invariant before [L793-L793] ((((0 <= __unbuffered_p2_EBX) && (__unbuffered_p2_EBX <= 1)) && (x == 2)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && ((__unbuffered_p0_EAX == 0 && (__unbuffered_p2_EAX == 2 || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) || (((((((0 <= __unbuffered_p0_EAX && 0 <= __unbuffered_p2_EAX) && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-02-07 19:04:25,017 INFO L76 edCorrectnessWitness]: Location invariant before [L788-L788] main$tmp_guard0 == (_Bool)0 || main$tmp_guard0 == (_Bool)1 [2024-02-07 19:04:25,017 INFO L76 edCorrectnessWitness]: Location invariant before [L18-L18] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 19:04:25,017 INFO L76 edCorrectnessWitness]: Location invariant before [L794-L794] main$tmp_guard1 == (_Bool)0 || main$tmp_guard1 == (_Bool)1 [2024-02-07 19:04:25,018 INFO L76 edCorrectnessWitness]: Location invariant before [L730-L730] (((0 <= x) && (x <= 2)) && (x <= 127)) && ((x == 0 || x == 1) || x == 2) [2024-02-07 19:04:25,018 INFO L76 edCorrectnessWitness]: Location invariant before [L758-L758] (((0 <= __unbuffered_p2_EAX) && (__unbuffered_p2_EAX <= 2)) && (__unbuffered_p2_EAX <= 127)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2) [2024-02-07 19:04:25,018 INFO L76 edCorrectnessWitness]: Location invariant before [L766-L766] 1 <= __unbuffered_cnt [2024-02-07 19:04:25,019 INFO L76 edCorrectnessWitness]: Location invariant before [L746-L746] x == 2 [2024-02-07 19:04:25,093 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:04:25,459 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-02-07 19:04:25,679 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:04:25,691 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:04:25,757 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:04:25,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:04:26,034 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:04:26,035 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26 WrapperNode [2024-02-07 19:04:26,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:04:26,038 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:04:26,038 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:04:26,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:04:26,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,158 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2024-02-07 19:04:26,160 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:04:26,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:04:26,161 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:04:26,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:04:26,188 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,247 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-07 19:04:26,247 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,279 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:04:26,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:04:26,292 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:04:26,292 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:04:26,293 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (1/1) ... [2024-02-07 19:04:26,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:04:26,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:04:26,364 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) [2024-02-07 19:04:26,410 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 [2024-02-07 19:04:26,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:04:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:04:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:04:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:04:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:04:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:04:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:04:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:04:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-02-07 19:04:26,458 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-02-07 19:04:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-02-07 19:04:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-02-07 19:04:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-02-07 19:04:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-02-07 19:04:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:04:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:04:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:04:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:04:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:04:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:04:26,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:04:26,461 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:04:26,604 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:04:26,606 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:04:27,142 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:04:27,152 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:04:27,395 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:04:27,395 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-07 19:04:27,396 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:04:27 BoogieIcfgContainer [2024-02-07 19:04:27,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:04:27,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:04:27,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:04:27,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:04:27,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:04:24" (1/4) ... [2024-02-07 19:04:27,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fdfc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:04:27, skipping insertion in model container [2024-02-07 19:04:27,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:04:24" (2/4) ... [2024-02-07 19:04:27,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fdfc17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:04:27, skipping insertion in model container [2024-02-07 19:04:27,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:04:26" (3/4) ... [2024-02-07 19:04:27,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fdfc17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:04:27, skipping insertion in model container [2024-02-07 19:04:27,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:04:27" (4/4) ... [2024-02-07 19:04:27,421 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-02-07 19:04:27,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:04:27,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2024-02-07 19:04:27,455 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:04:27,564 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:04:27,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 136 flow [2024-02-07 19:04:27,718 INFO L124 PetriNetUnfolderBase]: 1/59 cut-off events. [2024-02-07 19:04:27,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:04:27,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 59 events. 1/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2024-02-07 19:04:27,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 136 flow [2024-02-07 19:04:27,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 127 flow [2024-02-07 19:04:27,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:04:27,767 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;@5aa1382a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:04:27,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-02-07 19:04:27,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:04:27,774 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-02-07 19:04:27,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:04:27,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:27,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-07 19:04:27,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:27,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 9796008, now seen corresponding path program 1 times [2024-02-07 19:04:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:27,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544480723] [2024-02-07 19:04:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:27,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544480723] [2024-02-07 19:04:28,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544480723] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:28,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:28,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:04:28,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551489712] [2024-02-07 19:04:28,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:28,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 19:04:28,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 19:04:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 19:04:28,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:28,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 127 flow. Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:28,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:28,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:28,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:30,536 INFO L124 PetriNetUnfolderBase]: 7577/12719 cut-off events. [2024-02-07 19:04:30,539 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-02-07 19:04:30,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23524 conditions, 12719 events. 7577/12719 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 100073 event pairs, 7577 based on Foata normal form. 294/9000 useless extension candidates. Maximal degree in co-relation 23513. Up to 10701 conditions per place. [2024-02-07 19:04:30,761 INFO L140 encePairwiseOnDemand]: 50/62 looper letters, 32 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2024-02-07 19:04:30,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 167 flow [2024-02-07 19:04:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 19:04:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 19:04:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 80 transitions. [2024-02-07 19:04:30,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-02-07 19:04:30,783 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 127 flow. Second operand 2 states and 80 transitions. [2024-02-07 19:04:30,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 167 flow [2024-02-07 19:04:30,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:04:30,817 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 100 flow [2024-02-07 19:04:30,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-02-07 19:04:30,823 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -13 predicate places. [2024-02-07 19:04:30,824 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 100 flow [2024-02-07 19:04:30,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:30,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:30,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:04:30,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:04:30,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:30,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 824040298, now seen corresponding path program 1 times [2024-02-07 19:04:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258965562] [2024-02-07 19:04:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:30,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:30,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:30,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258965562] [2024-02-07 19:04:30,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258965562] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:30,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:30,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:04:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120316854] [2024-02-07 19:04:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:30,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:30,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:30,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:30,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:30,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:30,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:31,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:32,172 INFO L124 PetriNetUnfolderBase]: 6886/11760 cut-off events. [2024-02-07 19:04:32,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:04:32,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 11760 events. 6886/11760 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 91841 event pairs, 1676 based on Foata normal form. 0/8246 useless extension candidates. Maximal degree in co-relation 21609. Up to 9072 conditions per place. [2024-02-07 19:04:32,338 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 48 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-02-07 19:04:32,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 238 flow [2024-02-07 19:04:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-07 19:04:32,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2024-02-07 19:04:32,351 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 100 flow. Second operand 3 states and 107 transitions. [2024-02-07 19:04:32,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 238 flow [2024-02-07 19:04:32,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:04:32,372 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 112 flow [2024-02-07 19:04:32,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-02-07 19:04:32,374 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-02-07 19:04:32,374 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 112 flow [2024-02-07 19:04:32,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:32,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:32,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:32,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:04:32,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:32,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:32,376 INFO L85 PathProgramCache]: Analyzing trace with hash 226761029, now seen corresponding path program 1 times [2024-02-07 19:04:32,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:32,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674355375] [2024-02-07 19:04:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:32,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674355375] [2024-02-07 19:04:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674355375] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:32,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:04:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418243696] [2024-02-07 19:04:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:32,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:32,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:33,302 INFO L124 PetriNetUnfolderBase]: 5260/7936 cut-off events. [2024-02-07 19:04:33,303 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2024-02-07 19:04:33,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16743 conditions, 7936 events. 5260/7936 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 49377 event pairs, 1730 based on Foata normal form. 0/6657 useless extension candidates. Maximal degree in co-relation 16738. Up to 6367 conditions per place. [2024-02-07 19:04:33,358 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 51 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-02-07 19:04:33,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 281 flow [2024-02-07 19:04:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-02-07 19:04:33,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075268817204301 [2024-02-07 19:04:33,361 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 112 flow. Second operand 3 states and 113 transitions. [2024-02-07 19:04:33,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 281 flow [2024-02-07 19:04:33,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:04:33,363 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 140 flow [2024-02-07 19:04:33,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-02-07 19:04:33,364 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 19:04:33,365 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 140 flow [2024-02-07 19:04:33,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:33,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:33,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:33,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:04:33,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:33,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1560342343, now seen corresponding path program 1 times [2024-02-07 19:04:33,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:33,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105594573] [2024-02-07 19:04:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:33,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105594573] [2024-02-07 19:04:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105594573] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:33,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:04:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653123860] [2024-02-07 19:04:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:33,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 19:04:33,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:33,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:33,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 19:04:33,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:34,288 INFO L124 PetriNetUnfolderBase]: 5260/8926 cut-off events. [2024-02-07 19:04:34,289 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2024-02-07 19:04:34,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19742 conditions, 8926 events. 5260/8926 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 66671 event pairs, 4956 based on Foata normal form. 0/7403 useless extension candidates. Maximal degree in co-relation 19736. Up to 7559 conditions per place. [2024-02-07 19:04:34,342 INFO L140 encePairwiseOnDemand]: 60/62 looper letters, 34 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2024-02-07 19:04:34,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 208 flow [2024-02-07 19:04:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-02-07 19:04:34,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-02-07 19:04:34,348 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 140 flow. Second operand 3 states and 84 transitions. [2024-02-07 19:04:34,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 208 flow [2024-02-07 19:04:34,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:34,351 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 136 flow [2024-02-07 19:04:34,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-02-07 19:04:34,353 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 19:04:34,353 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 136 flow [2024-02-07 19:04:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:34,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:34,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:34,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:04:34,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:34,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1560298733, now seen corresponding path program 1 times [2024-02-07 19:04:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:34,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469994105] [2024-02-07 19:04:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:34,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:34,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469994105] [2024-02-07 19:04:34,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469994105] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:34,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:34,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:04:34,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476941582] [2024-02-07 19:04:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:34,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:34,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:34,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:34,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:34,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:34,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:35,131 INFO L124 PetriNetUnfolderBase]: 5157/8016 cut-off events. [2024-02-07 19:04:35,132 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-02-07 19:04:35,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18317 conditions, 8016 events. 5157/8016 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 52011 event pairs, 1453 based on Foata normal form. 0/7071 useless extension candidates. Maximal degree in co-relation 18311. Up to 6730 conditions per place. [2024-02-07 19:04:35,192 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 58 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-02-07 19:04:35,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 329 flow [2024-02-07 19:04:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-02-07 19:04:35,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-02-07 19:04:35,194 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 136 flow. Second operand 3 states and 110 transitions. [2024-02-07 19:04:35,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 329 flow [2024-02-07 19:04:35,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:35,196 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 143 flow [2024-02-07 19:04:35,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-02-07 19:04:35,197 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-02-07 19:04:35,198 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 143 flow [2024-02-07 19:04:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:35,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:35,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:04:35,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:35,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash -412014221, now seen corresponding path program 1 times [2024-02-07 19:04:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:35,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130930275] [2024-02-07 19:04:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:35,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:35,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130930275] [2024-02-07 19:04:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130930275] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:35,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:35,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:04:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910596774] [2024-02-07 19:04:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:35,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:35,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:35,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:35,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:35,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:35,827 INFO L124 PetriNetUnfolderBase]: 4625/7749 cut-off events. [2024-02-07 19:04:35,828 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2024-02-07 19:04:35,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17829 conditions, 7749 events. 4625/7749 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55997 event pairs, 3871 based on Foata normal form. 94/6751 useless extension candidates. Maximal degree in co-relation 17822. Up to 6020 conditions per place. [2024-02-07 19:04:35,895 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 53 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-02-07 19:04:35,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 314 flow [2024-02-07 19:04:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-07 19:04:35,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2024-02-07 19:04:35,898 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 143 flow. Second operand 3 states and 107 transitions. [2024-02-07 19:04:35,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 314 flow [2024-02-07 19:04:35,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:04:35,902 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 151 flow [2024-02-07 19:04:35,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-02-07 19:04:35,904 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-02-07 19:04:35,905 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 151 flow [2024-02-07 19:04:35,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:35,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:35,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:35,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:04:35,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:35,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1262033167, now seen corresponding path program 1 times [2024-02-07 19:04:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392416642] [2024-02-07 19:04:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392416642] [2024-02-07 19:04:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392416642] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:35,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:35,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:04:35,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977915580] [2024-02-07 19:04:35,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:35,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:35,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:35,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:35,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:36,532 INFO L124 PetriNetUnfolderBase]: 4118/6489 cut-off events. [2024-02-07 19:04:36,532 INFO L125 PetriNetUnfolderBase]: For 3149/3149 co-relation queries the response was YES. [2024-02-07 19:04:36,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16258 conditions, 6489 events. 4118/6489 cut-off events. For 3149/3149 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41165 event pairs, 1120 based on Foata normal form. 212/6051 useless extension candidates. Maximal degree in co-relation 16250. Up to 5342 conditions per place. [2024-02-07 19:04:36,583 INFO L140 encePairwiseOnDemand]: 60/62 looper letters, 58 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2024-02-07 19:04:36,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 348 flow [2024-02-07 19:04:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-02-07 19:04:36,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860215053763441 [2024-02-07 19:04:36,585 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 151 flow. Second operand 3 states and 109 transitions. [2024-02-07 19:04:36,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 348 flow [2024-02-07 19:04:36,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:04:36,589 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 143 flow [2024-02-07 19:04:36,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-07 19:04:36,590 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -8 predicate places. [2024-02-07 19:04:36,590 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 143 flow [2024-02-07 19:04:36,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:36,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:36,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:36,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:04:36,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:36,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash 112877440, now seen corresponding path program 1 times [2024-02-07 19:04:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:36,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905888094] [2024-02-07 19:04:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:36,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:36,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905888094] [2024-02-07 19:04:36,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905888094] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:36,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:36,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:04:36,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933853840] [2024-02-07 19:04:36,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:36,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:36,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:36,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:36,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:36,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:36,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:36,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:36,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:37,016 INFO L124 PetriNetUnfolderBase]: 3252/5403 cut-off events. [2024-02-07 19:04:37,016 INFO L125 PetriNetUnfolderBase]: For 2149/2163 co-relation queries the response was YES. [2024-02-07 19:04:37,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12433 conditions, 5403 events. 3252/5403 cut-off events. For 2149/2163 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35373 event pairs, 1334 based on Foata normal form. 350/4998 useless extension candidates. Maximal degree in co-relation 12426. Up to 3712 conditions per place. [2024-02-07 19:04:37,042 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 50 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2024-02-07 19:04:37,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 289 flow [2024-02-07 19:04:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-02-07 19:04:37,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-02-07 19:04:37,046 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 143 flow. Second operand 3 states and 102 transitions. [2024-02-07 19:04:37,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 289 flow [2024-02-07 19:04:37,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:37,049 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 132 flow [2024-02-07 19:04:37,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-02-07 19:04:37,052 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 19:04:37,052 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 132 flow [2024-02-07 19:04:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:37,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:37,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:04:37,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:37,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash -545395974, now seen corresponding path program 1 times [2024-02-07 19:04:37,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378993378] [2024-02-07 19:04:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378993378] [2024-02-07 19:04:37,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378993378] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:37,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:37,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:04:37,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008428282] [2024-02-07 19:04:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:37,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:04:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:04:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:04:37,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 19:04:37,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:37,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:37,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 19:04:37,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:37,549 INFO L124 PetriNetUnfolderBase]: 3205/5636 cut-off events. [2024-02-07 19:04:37,549 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-02-07 19:04:37,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12867 conditions, 5636 events. 3205/5636 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 39589 event pairs, 597 based on Foata normal form. 179/4989 useless extension candidates. Maximal degree in co-relation 12860. Up to 2593 conditions per place. [2024-02-07 19:04:37,576 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-02-07 19:04:37,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 332 flow [2024-02-07 19:04:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:04:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:04:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 19:04:37,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201612903225806 [2024-02-07 19:04:37,578 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 132 flow. Second operand 4 states and 129 transitions. [2024-02-07 19:04:37,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 332 flow [2024-02-07 19:04:37,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:37,581 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 157 flow [2024-02-07 19:04:37,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-02-07 19:04:37,581 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2024-02-07 19:04:37,582 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 157 flow [2024-02-07 19:04:37,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:37,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:37,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:04:37,582 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:37,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1747831809, now seen corresponding path program 1 times [2024-02-07 19:04:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:37,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218682676] [2024-02-07 19:04:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218682676] [2024-02-07 19:04:37,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218682676] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:37,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:37,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:04:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774687478] [2024-02-07 19:04:37,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:37,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:04:37,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:37,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:04:37,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:04:37,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:37,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:37,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:37,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:37,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:37,797 INFO L124 PetriNetUnfolderBase]: 1852/3275 cut-off events. [2024-02-07 19:04:37,797 INFO L125 PetriNetUnfolderBase]: For 1472/1484 co-relation queries the response was YES. [2024-02-07 19:04:37,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7951 conditions, 3275 events. 1852/3275 cut-off events. For 1472/1484 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20585 event pairs, 792 based on Foata normal form. 98/3223 useless extension candidates. Maximal degree in co-relation 7942. Up to 2510 conditions per place. [2024-02-07 19:04:37,808 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 35 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2024-02-07 19:04:37,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 252 flow [2024-02-07 19:04:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:04:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:04:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-02-07 19:04:37,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-02-07 19:04:37,809 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 157 flow. Second operand 3 states and 98 transitions. [2024-02-07 19:04:37,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 252 flow [2024-02-07 19:04:37,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:04:37,811 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 135 flow [2024-02-07 19:04:37,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2024-02-07 19:04:37,812 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 19:04:37,812 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 135 flow [2024-02-07 19:04:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:37,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:37,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:37,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:04:37,813 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:37,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1769238206, now seen corresponding path program 1 times [2024-02-07 19:04:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925227219] [2024-02-07 19:04:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:37,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925227219] [2024-02-07 19:04:37,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925227219] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:37,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:37,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:04:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39868417] [2024-02-07 19:04:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:04:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:04:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:04:37,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:37,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:37,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:37,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:37,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:38,108 INFO L124 PetriNetUnfolderBase]: 1497/2716 cut-off events. [2024-02-07 19:04:38,109 INFO L125 PetriNetUnfolderBase]: For 1194/1194 co-relation queries the response was YES. [2024-02-07 19:04:38,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6501 conditions, 2716 events. 1497/2716 cut-off events. For 1194/1194 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16802 event pairs, 678 based on Foata normal form. 4/2612 useless extension candidates. Maximal degree in co-relation 6492. Up to 2109 conditions per place. [2024-02-07 19:04:38,122 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 43 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-02-07 19:04:38,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 306 flow [2024-02-07 19:04:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:04:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:04:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-02-07 19:04:38,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-02-07 19:04:38,124 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 135 flow. Second operand 4 states and 119 transitions. [2024-02-07 19:04:38,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 306 flow [2024-02-07 19:04:38,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-02-07 19:04:38,127 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 159 flow [2024-02-07 19:04:38,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-02-07 19:04:38,128 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -8 predicate places. [2024-02-07 19:04:38,128 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 159 flow [2024-02-07 19:04:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:38,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:38,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:04:38,129 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:38,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2130606683, now seen corresponding path program 1 times [2024-02-07 19:04:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:38,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002114825] [2024-02-07 19:04:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:38,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002114825] [2024-02-07 19:04:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002114825] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:38,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:04:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122670092] [2024-02-07 19:04:38,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:38,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:04:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:04:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:04:38,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 19:04:38,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:38,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:38,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 19:04:38,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:38,443 INFO L124 PetriNetUnfolderBase]: 1127/2044 cut-off events. [2024-02-07 19:04:38,443 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2024-02-07 19:04:38,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5080 conditions, 2044 events. 1127/2044 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11560 event pairs, 125 based on Foata normal form. 98/2058 useless extension candidates. Maximal degree in co-relation 5071. Up to 593 conditions per place. [2024-02-07 19:04:38,449 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 64 selfloop transitions, 8 changer transitions 1/87 dead transitions. [2024-02-07 19:04:38,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 445 flow [2024-02-07 19:04:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:04:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:04:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-02-07 19:04:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935483870967742 [2024-02-07 19:04:38,450 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 159 flow. Second operand 5 states and 153 transitions. [2024-02-07 19:04:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 445 flow [2024-02-07 19:04:38,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 438 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:38,452 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 202 flow [2024-02-07 19:04:38,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-02-07 19:04:38,453 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2024-02-07 19:04:38,453 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 202 flow [2024-02-07 19:04:38,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:38,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:38,453 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] [2024-02-07 19:04:38,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:04:38,454 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:38,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash 199267297, now seen corresponding path program 1 times [2024-02-07 19:04:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:38,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466503075] [2024-02-07 19:04:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:38,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:38,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466503075] [2024-02-07 19:04:38,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466503075] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:38,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:38,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:04:38,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531609452] [2024-02-07 19:04:38,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:38,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:04:38,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:04:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:04:38,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:38,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) [2024-02-07 19:04:38,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:38,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:38,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:38,917 INFO L124 PetriNetUnfolderBase]: 1095/2106 cut-off events. [2024-02-07 19:04:38,917 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-02-07 19:04:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5553 conditions, 2106 events. 1095/2106 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 12533 event pairs, 451 based on Foata normal form. 8/2030 useless extension candidates. Maximal degree in co-relation 5542. Up to 1341 conditions per place. [2024-02-07 19:04:38,930 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 83 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-02-07 19:04:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 108 transitions, 663 flow [2024-02-07 19:04:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:04:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:04:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-02-07 19:04:38,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2024-02-07 19:04:38,932 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 202 flow. Second operand 7 states and 204 transitions. [2024-02-07 19:04:38,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 108 transitions, 663 flow [2024-02-07 19:04:38,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 592 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-02-07 19:04:38,937 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 273 flow [2024-02-07 19:04:38,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-02-07 19:04:38,938 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-02-07 19:04:38,938 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 273 flow [2024-02-07 19:04:38,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) [2024-02-07 19:04:38,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:38,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:38,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 19:04:38,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:38,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 400476591, now seen corresponding path program 2 times [2024-02-07 19:04:38,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:38,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210472142] [2024-02-07 19:04:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210472142] [2024-02-07 19:04:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210472142] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:39,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:39,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:04:39,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722598167] [2024-02-07 19:04:39,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:04:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:04:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:04:39,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:39,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 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) [2024-02-07 19:04:39,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:39,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:39,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:39,433 INFO L124 PetriNetUnfolderBase]: 1287/2453 cut-off events. [2024-02-07 19:04:39,433 INFO L125 PetriNetUnfolderBase]: For 2235/2235 co-relation queries the response was YES. [2024-02-07 19:04:39,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6998 conditions, 2453 events. 1287/2453 cut-off events. For 2235/2235 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 15149 event pairs, 500 based on Foata normal form. 8/2362 useless extension candidates. Maximal degree in co-relation 6983. Up to 1441 conditions per place. [2024-02-07 19:04:39,446 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 95 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-02-07 19:04:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 136 transitions, 849 flow [2024-02-07 19:04:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:04:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:04:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-02-07 19:04:39,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471326164874552 [2024-02-07 19:04:39,448 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 273 flow. Second operand 9 states and 263 transitions. [2024-02-07 19:04:39,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 136 transitions, 849 flow [2024-02-07 19:04:39,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 136 transitions, 829 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:39,454 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 448 flow [2024-02-07 19:04:39,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=448, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-02-07 19:04:39,455 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2024-02-07 19:04:39,455 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 448 flow [2024-02-07 19:04:39,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 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) [2024-02-07 19:04:39,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:39,456 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] [2024-02-07 19:04:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 19:04:39,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:39,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1983091119, now seen corresponding path program 3 times [2024-02-07 19:04:39,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:39,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000782876] [2024-02-07 19:04:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:39,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000782876] [2024-02-07 19:04:39,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000782876] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:39,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:39,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:04:39,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619730017] [2024-02-07 19:04:39,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:39,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:04:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:39,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:04:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:04:39,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:39,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 448 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) [2024-02-07 19:04:39,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:39,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:39,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:39,920 INFO L124 PetriNetUnfolderBase]: 1393/2657 cut-off events. [2024-02-07 19:04:39,920 INFO L125 PetriNetUnfolderBase]: For 4635/4635 co-relation queries the response was YES. [2024-02-07 19:04:39,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8500 conditions, 2657 events. 1393/2657 cut-off events. For 4635/4635 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 16649 event pairs, 564 based on Foata normal form. 8/2550 useless extension candidates. Maximal degree in co-relation 8480. Up to 1765 conditions per place. [2024-02-07 19:04:39,935 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 92 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-02-07 19:04:39,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 946 flow [2024-02-07 19:04:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:04:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:04:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-02-07 19:04:39,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48847926267281105 [2024-02-07 19:04:39,936 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 448 flow. Second operand 7 states and 212 transitions. [2024-02-07 19:04:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 946 flow [2024-02-07 19:04:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 932 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-02-07 19:04:39,943 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 599 flow [2024-02-07 19:04:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-02-07 19:04:39,944 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2024-02-07 19:04:39,944 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 599 flow [2024-02-07 19:04:39,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) [2024-02-07 19:04:39,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:39,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:39,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 19:04:39,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:39,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash 171230036, now seen corresponding path program 1 times [2024-02-07 19:04:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:39,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596316248] [2024-02-07 19:04:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:40,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:40,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596316248] [2024-02-07 19:04:40,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596316248] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:40,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:40,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:04:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925011484] [2024-02-07 19:04:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:04:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:04:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:04:40,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:40,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 599 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) [2024-02-07 19:04:40,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:40,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:40,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:40,433 INFO L124 PetriNetUnfolderBase]: 1505/2882 cut-off events. [2024-02-07 19:04:40,433 INFO L125 PetriNetUnfolderBase]: For 7085/7085 co-relation queries the response was YES. [2024-02-07 19:04:40,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9863 conditions, 2882 events. 1505/2882 cut-off events. For 7085/7085 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 18480 event pairs, 355 based on Foata normal form. 4/2760 useless extension candidates. Maximal degree in co-relation 9838. Up to 1876 conditions per place. [2024-02-07 19:04:40,447 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 96 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-02-07 19:04:40,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 130 transitions, 1067 flow [2024-02-07 19:04:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:04:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:04:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-02-07 19:04:40,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631336405529954 [2024-02-07 19:04:40,449 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 599 flow. Second operand 7 states and 201 transitions. [2024-02-07 19:04:40,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 130 transitions, 1067 flow [2024-02-07 19:04:40,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1044 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:40,458 INFO L231 Difference]: Finished difference. Result has 101 places, 90 transitions, 711 flow [2024-02-07 19:04:40,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=101, PETRI_TRANSITIONS=90} [2024-02-07 19:04:40,459 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2024-02-07 19:04:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 90 transitions, 711 flow [2024-02-07 19:04:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) [2024-02-07 19:04:40,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:40,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 19:04:40,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:40,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2121896142, now seen corresponding path program 2 times [2024-02-07 19:04:40,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:40,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940171742] [2024-02-07 19:04:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:40,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:40,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:40,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940171742] [2024-02-07 19:04:40,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940171742] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:40,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:40,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:04:40,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316260905] [2024-02-07 19:04:40,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:40,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:04:40,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:04:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:04:40,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:40,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 90 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:40,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:40,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:41,014 INFO L124 PetriNetUnfolderBase]: 1690/3224 cut-off events. [2024-02-07 19:04:41,014 INFO L125 PetriNetUnfolderBase]: For 8846/8846 co-relation queries the response was YES. [2024-02-07 19:04:41,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11347 conditions, 3224 events. 1690/3224 cut-off events. For 8846/8846 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 21011 event pairs, 432 based on Foata normal form. 8/3085 useless extension candidates. Maximal degree in co-relation 11319. Up to 2167 conditions per place. [2024-02-07 19:04:41,043 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 89 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2024-02-07 19:04:41,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1240 flow [2024-02-07 19:04:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:04:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:04:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-02-07 19:04:41,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-02-07 19:04:41,045 INFO L175 Difference]: Start difference. First operand has 101 places, 90 transitions, 711 flow. Second operand 5 states and 150 transitions. [2024-02-07 19:04:41,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1240 flow [2024-02-07 19:04:41,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1214 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-02-07 19:04:41,056 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 959 flow [2024-02-07 19:04:41,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2024-02-07 19:04:41,056 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2024-02-07 19:04:41,057 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 959 flow [2024-02-07 19:04:41,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:41,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:41,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 19:04:41,057 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:41,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2079143338, now seen corresponding path program 3 times [2024-02-07 19:04:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:41,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393728538] [2024-02-07 19:04:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:41,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393728538] [2024-02-07 19:04:41,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393728538] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:41,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:41,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:04:41,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427487342] [2024-02-07 19:04:41,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:41,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:04:41,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:41,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:04:41,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:04:41,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:41,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 959 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:41,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:41,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:41,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:41,620 INFO L124 PetriNetUnfolderBase]: 1682/3222 cut-off events. [2024-02-07 19:04:41,620 INFO L125 PetriNetUnfolderBase]: For 10931/10931 co-relation queries the response was YES. [2024-02-07 19:04:41,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11958 conditions, 3222 events. 1682/3222 cut-off events. For 10931/10931 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 21081 event pairs, 416 based on Foata normal form. 4/3075 useless extension candidates. Maximal degree in co-relation 11926. Up to 2050 conditions per place. [2024-02-07 19:04:41,651 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 100 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2024-02-07 19:04:41,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 1336 flow [2024-02-07 19:04:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:04:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:04:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-02-07 19:04:41,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47419354838709676 [2024-02-07 19:04:41,653 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 959 flow. Second operand 5 states and 147 transitions. [2024-02-07 19:04:41,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 1336 flow [2024-02-07 19:04:41,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 1306 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:41,679 INFO L231 Difference]: Finished difference. Result has 113 places, 108 transitions, 1018 flow [2024-02-07 19:04:41,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1018, PETRI_PLACES=113, PETRI_TRANSITIONS=108} [2024-02-07 19:04:41,680 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 45 predicate places. [2024-02-07 19:04:41,680 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 108 transitions, 1018 flow [2024-02-07 19:04:41,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:41,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:41,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:41,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 19:04:41,681 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:41,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash 768938189, now seen corresponding path program 1 times [2024-02-07 19:04:41,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036403597] [2024-02-07 19:04:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:41,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:41,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:41,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036403597] [2024-02-07 19:04:41,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036403597] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:41,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:41,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:04:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070658408] [2024-02-07 19:04:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:04:41,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:04:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:04:41,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 19:04:41,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 108 transitions, 1018 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:41,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:41,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 19:04:41,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:42,099 INFO L124 PetriNetUnfolderBase]: 1254/2081 cut-off events. [2024-02-07 19:04:42,100 INFO L125 PetriNetUnfolderBase]: For 8870/8870 co-relation queries the response was YES. [2024-02-07 19:04:42,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 2081 events. 1254/2081 cut-off events. For 8870/8870 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10690 event pairs, 112 based on Foata normal form. 76/2129 useless extension candidates. Maximal degree in co-relation 8892. Up to 736 conditions per place. [2024-02-07 19:04:42,113 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 153 selfloop transitions, 11 changer transitions 1/179 dead transitions. [2024-02-07 19:04:42,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 179 transitions, 1985 flow [2024-02-07 19:04:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:04:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:04:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-02-07 19:04:42,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-02-07 19:04:42,116 INFO L175 Difference]: Start difference. First operand has 113 places, 108 transitions, 1018 flow. Second operand 6 states and 165 transitions. [2024-02-07 19:04:42,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 179 transitions, 1985 flow [2024-02-07 19:04:42,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 179 transitions, 1788 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-02-07 19:04:42,131 INFO L231 Difference]: Finished difference. Result has 110 places, 102 transitions, 880 flow [2024-02-07 19:04:42,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=880, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2024-02-07 19:04:42,132 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 42 predicate places. [2024-02-07 19:04:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 880 flow [2024-02-07 19:04:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:42,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:42,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:42,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 19:04:42,133 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:42,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -758641657, now seen corresponding path program 1 times [2024-02-07 19:04:42,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815639398] [2024-02-07 19:04:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:42,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815639398] [2024-02-07 19:04:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815639398] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:42,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:42,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:04:42,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197478166] [2024-02-07 19:04:42,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:42,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:42,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:42,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:42,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:42,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:42,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:42,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:42,802 INFO L124 PetriNetUnfolderBase]: 1493/2681 cut-off events. [2024-02-07 19:04:42,803 INFO L125 PetriNetUnfolderBase]: For 7979/7979 co-relation queries the response was YES. [2024-02-07 19:04:42,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10296 conditions, 2681 events. 1493/2681 cut-off events. For 7979/7979 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15727 event pairs, 250 based on Foata normal form. 0/2630 useless extension candidates. Maximal degree in co-relation 10268. Up to 1567 conditions per place. [2024-02-07 19:04:42,828 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 152 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-02-07 19:04:42,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 1771 flow [2024-02-07 19:04:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:04:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:04:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-02-07 19:04:42,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467741935483871 [2024-02-07 19:04:42,831 INFO L175 Difference]: Start difference. First operand has 110 places, 102 transitions, 880 flow. Second operand 10 states and 277 transitions. [2024-02-07 19:04:42,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 1771 flow [2024-02-07 19:04:42,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 1555 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-02-07 19:04:42,855 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 1014 flow [2024-02-07 19:04:42,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1014, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2024-02-07 19:04:42,856 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 48 predicate places. [2024-02-07 19:04:42,856 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 1014 flow [2024-02-07 19:04:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-07 19:04:42,857 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1120971341, now seen corresponding path program 2 times [2024-02-07 19:04:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:42,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066130390] [2024-02-07 19:04:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:42,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066130390] [2024-02-07 19:04:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066130390] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:43,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:43,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:04:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347771514] [2024-02-07 19:04:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:43,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:43,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 1014 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:43,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:43,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:43,443 INFO L124 PetriNetUnfolderBase]: 1875/3447 cut-off events. [2024-02-07 19:04:43,443 INFO L125 PetriNetUnfolderBase]: For 8589/8589 co-relation queries the response was YES. [2024-02-07 19:04:43,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11651 conditions, 3447 events. 1875/3447 cut-off events. For 8589/8589 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21735 event pairs, 426 based on Foata normal form. 8/3388 useless extension candidates. Maximal degree in co-relation 11622. Up to 1333 conditions per place. [2024-02-07 19:04:43,470 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 161 selfloop transitions, 23 changer transitions 0/198 dead transitions. [2024-02-07 19:04:43,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 198 transitions, 1754 flow [2024-02-07 19:04:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:04:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:04:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-02-07 19:04:43,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-02-07 19:04:43,472 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 1014 flow. Second operand 9 states and 261 transitions. [2024-02-07 19:04:43,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 198 transitions, 1754 flow [2024-02-07 19:04:43,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 198 transitions, 1676 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-02-07 19:04:43,497 INFO L231 Difference]: Finished difference. Result has 123 places, 116 transitions, 1050 flow [2024-02-07 19:04:43,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1050, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2024-02-07 19:04:43,498 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2024-02-07 19:04:43,498 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 1050 flow [2024-02-07 19:04:43,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:43,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:43,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:43,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-07 19:04:43,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:43,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2125465487, now seen corresponding path program 3 times [2024-02-07 19:04:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:43,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075295653] [2024-02-07 19:04:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:43,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075295653] [2024-02-07 19:04:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075295653] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:43,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:43,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084609403] [2024-02-07 19:04:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:43,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:43,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:43,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:43,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 1050 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:43,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:43,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:43,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:44,270 INFO L124 PetriNetUnfolderBase]: 2162/4043 cut-off events. [2024-02-07 19:04:44,270 INFO L125 PetriNetUnfolderBase]: For 10173/10173 co-relation queries the response was YES. [2024-02-07 19:04:44,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 4043 events. 2162/4043 cut-off events. For 10173/10173 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26766 event pairs, 718 based on Foata normal form. 8/3967 useless extension candidates. Maximal degree in co-relation 13029. Up to 2036 conditions per place. [2024-02-07 19:04:44,291 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 157 selfloop transitions, 40 changer transitions 0/211 dead transitions. [2024-02-07 19:04:44,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 1912 flow [2024-02-07 19:04:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:04:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:04:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-02-07 19:04:44,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-02-07 19:04:44,293 INFO L175 Difference]: Start difference. First operand has 123 places, 116 transitions, 1050 flow. Second operand 10 states and 280 transitions. [2024-02-07 19:04:44,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 1912 flow [2024-02-07 19:04:44,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 1855 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-02-07 19:04:44,319 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 1166 flow [2024-02-07 19:04:44,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1166, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2024-02-07 19:04:44,320 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 64 predicate places. [2024-02-07 19:04:44,320 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 1166 flow [2024-02-07 19:04:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:44,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:44,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:44,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-07 19:04:44,321 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:44,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash -460132305, now seen corresponding path program 4 times [2024-02-07 19:04:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:44,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906103146] [2024-02-07 19:04:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906103146] [2024-02-07 19:04:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906103146] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:44,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:44,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106720534] [2024-02-07 19:04:44,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 1166 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:45,061 INFO L124 PetriNetUnfolderBase]: 2166/4127 cut-off events. [2024-02-07 19:04:45,061 INFO L125 PetriNetUnfolderBase]: For 11542/11542 co-relation queries the response was YES. [2024-02-07 19:04:45,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 4127 events. 2166/4127 cut-off events. For 11542/11542 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27913 event pairs, 714 based on Foata normal form. 8/4035 useless extension candidates. Maximal degree in co-relation 13466. Up to 2036 conditions per place. [2024-02-07 19:04:45,092 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 149 selfloop transitions, 38 changer transitions 0/201 dead transitions. [2024-02-07 19:04:45,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 201 transitions, 1905 flow [2024-02-07 19:04:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:04:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:04:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-02-07 19:04:45,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737903225806452 [2024-02-07 19:04:45,095 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 1166 flow. Second operand 8 states and 235 transitions. [2024-02-07 19:04:45,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 201 transitions, 1905 flow [2024-02-07 19:04:45,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 201 transitions, 1785 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-02-07 19:04:45,122 INFO L231 Difference]: Finished difference. Result has 136 places, 121 transitions, 1125 flow [2024-02-07 19:04:45,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=136, PETRI_TRANSITIONS=121} [2024-02-07 19:04:45,123 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 68 predicate places. [2024-02-07 19:04:45,123 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 121 transitions, 1125 flow [2024-02-07 19:04:45,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:45,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:45,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 19:04:45,124 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:45,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash -964201885, now seen corresponding path program 5 times [2024-02-07 19:04:45,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868856738] [2024-02-07 19:04:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:45,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868856738] [2024-02-07 19:04:45,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868856738] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:45,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:04:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899758595] [2024-02-07 19:04:45,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:45,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:45,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:45,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 121 transitions, 1125 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:45,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:45,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:45,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:45,862 INFO L124 PetriNetUnfolderBase]: 2170/4162 cut-off events. [2024-02-07 19:04:45,863 INFO L125 PetriNetUnfolderBase]: For 10406/10406 co-relation queries the response was YES. [2024-02-07 19:04:45,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13292 conditions, 4162 events. 2170/4162 cut-off events. For 10406/10406 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 28400 event pairs, 566 based on Foata normal form. 8/4055 useless extension candidates. Maximal degree in co-relation 13257. Up to 2670 conditions per place. [2024-02-07 19:04:45,898 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 159 selfloop transitions, 21 changer transitions 0/194 dead transitions. [2024-02-07 19:04:45,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 1759 flow [2024-02-07 19:04:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:04:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:04:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-02-07 19:04:45,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2024-02-07 19:04:45,899 INFO L175 Difference]: Start difference. First operand has 136 places, 121 transitions, 1125 flow. Second operand 9 states and 255 transitions. [2024-02-07 19:04:45,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 1759 flow [2024-02-07 19:04:45,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 1682 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 19:04:45,925 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 1117 flow [2024-02-07 19:04:45,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1117, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2024-02-07 19:04:45,926 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 72 predicate places. [2024-02-07 19:04:45,926 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 1117 flow [2024-02-07 19:04:45,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:45,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:45,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:45,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-07 19:04:45,926 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:45,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1317912857, now seen corresponding path program 6 times [2024-02-07 19:04:45,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:45,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628173265] [2024-02-07 19:04:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:45,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:46,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:46,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628173265] [2024-02-07 19:04:46,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628173265] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:46,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:46,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062801644] [2024-02-07 19:04:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:46,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:46,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:46,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 1117 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:46,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:46,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:46,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:46,725 INFO L124 PetriNetUnfolderBase]: 2677/5152 cut-off events. [2024-02-07 19:04:46,725 INFO L125 PetriNetUnfolderBase]: For 13459/13459 co-relation queries the response was YES. [2024-02-07 19:04:46,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 5152 events. 2677/5152 cut-off events. For 13459/13459 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 36699 event pairs, 964 based on Foata normal form. 8/5012 useless extension candidates. Maximal degree in co-relation 16249. Up to 2988 conditions per place. [2024-02-07 19:04:46,763 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 164 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2024-02-07 19:04:46,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 218 transitions, 2117 flow [2024-02-07 19:04:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:04:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:04:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-02-07 19:04:46,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778225806451613 [2024-02-07 19:04:46,764 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 1117 flow. Second operand 8 states and 237 transitions. [2024-02-07 19:04:46,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 218 transitions, 2117 flow [2024-02-07 19:04:46,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 218 transitions, 2081 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-02-07 19:04:46,796 INFO L231 Difference]: Finished difference. Result has 147 places, 135 transitions, 1418 flow [2024-02-07 19:04:46,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1418, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2024-02-07 19:04:46,796 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 79 predicate places. [2024-02-07 19:04:46,797 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 1418 flow [2024-02-07 19:04:46,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:46,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:46,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:46,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 19:04:46,798 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:46,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1988298347, now seen corresponding path program 7 times [2024-02-07 19:04:46,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:46,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977825298] [2024-02-07 19:04:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977825298] [2024-02-07 19:04:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977825298] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:46,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:46,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:04:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141153420] [2024-02-07 19:04:46,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:04:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:04:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:04:46,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:46,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 1418 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:46,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:46,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:46,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:47,844 INFO L124 PetriNetUnfolderBase]: 3389/6564 cut-off events. [2024-02-07 19:04:47,845 INFO L125 PetriNetUnfolderBase]: For 21986/21986 co-relation queries the response was YES. [2024-02-07 19:04:47,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21326 conditions, 6564 events. 3389/6564 cut-off events. For 21986/21986 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 49311 event pairs, 808 based on Foata normal form. 8/6392 useless extension candidates. Maximal degree in co-relation 21284. Up to 3019 conditions per place. [2024-02-07 19:04:47,890 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 172 selfloop transitions, 40 changer transitions 0/226 dead transitions. [2024-02-07 19:04:47,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 226 transitions, 2350 flow [2024-02-07 19:04:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:04:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:04:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-02-07 19:04:47,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930875576036866 [2024-02-07 19:04:47,891 INFO L175 Difference]: Start difference. First operand has 147 places, 135 transitions, 1418 flow. Second operand 7 states and 214 transitions. [2024-02-07 19:04:47,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 226 transitions, 2350 flow [2024-02-07 19:04:47,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2288 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-02-07 19:04:47,974 INFO L231 Difference]: Finished difference. Result has 157 places, 144 transitions, 1634 flow [2024-02-07 19:04:47,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1634, PETRI_PLACES=157, PETRI_TRANSITIONS=144} [2024-02-07 19:04:47,974 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 89 predicate places. [2024-02-07 19:04:47,974 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 144 transitions, 1634 flow [2024-02-07 19:04:47,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:47,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:47,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:47,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-02-07 19:04:47,975 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:47,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash 117101371, now seen corresponding path program 8 times [2024-02-07 19:04:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:47,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675142786] [2024-02-07 19:04:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675142786] [2024-02-07 19:04:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675142786] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:48,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683664932] [2024-02-07 19:04:48,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:48,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:48,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 144 transitions, 1634 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:48,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:48,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:48,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:49,082 INFO L124 PetriNetUnfolderBase]: 3722/7155 cut-off events. [2024-02-07 19:04:49,082 INFO L125 PetriNetUnfolderBase]: For 28491/28491 co-relation queries the response was YES. [2024-02-07 19:04:49,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23933 conditions, 7155 events. 3722/7155 cut-off events. For 28491/28491 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 54375 event pairs, 1494 based on Foata normal form. 8/6967 useless extension candidates. Maximal degree in co-relation 23886. Up to 4813 conditions per place. [2024-02-07 19:04:49,148 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 180 selfloop transitions, 43 changer transitions 0/237 dead transitions. [2024-02-07 19:04:49,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 237 transitions, 2588 flow [2024-02-07 19:04:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:04:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:04:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-02-07 19:04:49,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-02-07 19:04:49,150 INFO L175 Difference]: Start difference. First operand has 157 places, 144 transitions, 1634 flow. Second operand 10 states and 278 transitions. [2024-02-07 19:04:49,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 237 transitions, 2588 flow [2024-02-07 19:04:49,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 237 transitions, 2526 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-02-07 19:04:49,250 INFO L231 Difference]: Finished difference. Result has 169 places, 150 transitions, 1780 flow [2024-02-07 19:04:49,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1780, PETRI_PLACES=169, PETRI_TRANSITIONS=150} [2024-02-07 19:04:49,251 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 101 predicate places. [2024-02-07 19:04:49,251 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 150 transitions, 1780 flow [2024-02-07 19:04:49,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:49,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:49,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:49,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 19:04:49,252 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:49,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1793837097, now seen corresponding path program 9 times [2024-02-07 19:04:49,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:49,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312394832] [2024-02-07 19:04:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:49,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:49,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312394832] [2024-02-07 19:04:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312394832] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:49,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:04:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759914781] [2024-02-07 19:04:49,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:04:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:04:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:04:49,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:49,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 150 transitions, 1780 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:49,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:49,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:49,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:50,550 INFO L124 PetriNetUnfolderBase]: 4245/8284 cut-off events. [2024-02-07 19:04:50,551 INFO L125 PetriNetUnfolderBase]: For 36565/36565 co-relation queries the response was YES. [2024-02-07 19:04:50,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27421 conditions, 8284 events. 4245/8284 cut-off events. For 36565/36565 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 65651 event pairs, 762 based on Foata normal form. 8/8048 useless extension candidates. Maximal degree in co-relation 27370. Up to 2995 conditions per place. [2024-02-07 19:04:50,613 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 171 selfloop transitions, 49 changer transitions 0/234 dead transitions. [2024-02-07 19:04:50,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 234 transitions, 2684 flow [2024-02-07 19:04:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:04:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:04:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-02-07 19:04:50,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48847926267281105 [2024-02-07 19:04:50,614 INFO L175 Difference]: Start difference. First operand has 169 places, 150 transitions, 1780 flow. Second operand 7 states and 212 transitions. [2024-02-07 19:04:50,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 234 transitions, 2684 flow [2024-02-07 19:04:50,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 234 transitions, 2575 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-02-07 19:04:50,711 INFO L231 Difference]: Finished difference. Result has 176 places, 155 transitions, 1912 flow [2024-02-07 19:04:50,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1912, PETRI_PLACES=176, PETRI_TRANSITIONS=155} [2024-02-07 19:04:50,712 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 108 predicate places. [2024-02-07 19:04:50,712 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 155 transitions, 1912 flow [2024-02-07 19:04:50,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:50,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:50,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:50,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 19:04:50,713 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:50,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1327287519, now seen corresponding path program 10 times [2024-02-07 19:04:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:50,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291755703] [2024-02-07 19:04:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:50,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291755703] [2024-02-07 19:04:50,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291755703] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:50,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:50,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:50,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600994232] [2024-02-07 19:04:50,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:50,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:50,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:50,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:50,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 155 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:50,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:50,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:50,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:51,887 INFO L124 PetriNetUnfolderBase]: 4249/8298 cut-off events. [2024-02-07 19:04:51,887 INFO L125 PetriNetUnfolderBase]: For 41039/41039 co-relation queries the response was YES. [2024-02-07 19:04:51,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27911 conditions, 8298 events. 4249/8298 cut-off events. For 41039/41039 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65597 event pairs, 1834 based on Foata normal form. 8/8046 useless extension candidates. Maximal degree in co-relation 27856. Up to 5670 conditions per place. [2024-02-07 19:04:51,981 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 177 selfloop transitions, 41 changer transitions 0/232 dead transitions. [2024-02-07 19:04:51,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 232 transitions, 2738 flow [2024-02-07 19:04:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:04:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:04:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-02-07 19:04:51,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2024-02-07 19:04:51,983 INFO L175 Difference]: Start difference. First operand has 176 places, 155 transitions, 1912 flow. Second operand 8 states and 233 transitions. [2024-02-07 19:04:51,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 232 transitions, 2738 flow [2024-02-07 19:04:52,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 232 transitions, 2645 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-02-07 19:04:52,178 INFO L231 Difference]: Finished difference. Result has 182 places, 155 transitions, 1916 flow [2024-02-07 19:04:52,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=182, PETRI_TRANSITIONS=155} [2024-02-07 19:04:52,179 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2024-02-07 19:04:52,182 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 155 transitions, 1916 flow [2024-02-07 19:04:52,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:52,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:52,182 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, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:52,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 19:04:52,183 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:52,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1164934559, now seen corresponding path program 11 times [2024-02-07 19:04:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:52,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958105486] [2024-02-07 19:04:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:52,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:52,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:52,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958105486] [2024-02-07 19:04:52,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958105486] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:52,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:52,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:04:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196882239] [2024-02-07 19:04:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:04:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:04:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:04:52,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:52,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 155 transitions, 1916 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:52,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:52,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:52,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:53,541 INFO L124 PetriNetUnfolderBase]: 4237/8320 cut-off events. [2024-02-07 19:04:53,541 INFO L125 PetriNetUnfolderBase]: For 33823/33823 co-relation queries the response was YES. [2024-02-07 19:04:53,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27378 conditions, 8320 events. 4237/8320 cut-off events. For 33823/33823 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 66254 event pairs, 882 based on Foata normal form. 8/8068 useless extension candidates. Maximal degree in co-relation 27322. Up to 3383 conditions per place. [2024-02-07 19:04:53,614 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 188 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-02-07 19:04:53,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 243 transitions, 2810 flow [2024-02-07 19:04:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:04:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:04:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-02-07 19:04:53,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 19:04:53,616 INFO L175 Difference]: Start difference. First operand has 182 places, 155 transitions, 1916 flow. Second operand 7 states and 217 transitions. [2024-02-07 19:04:53,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 243 transitions, 2810 flow [2024-02-07 19:04:53,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 243 transitions, 2729 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 19:04:53,738 INFO L231 Difference]: Finished difference. Result has 185 places, 157 transitions, 1962 flow [2024-02-07 19:04:53,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1962, PETRI_PLACES=185, PETRI_TRANSITIONS=157} [2024-02-07 19:04:53,739 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2024-02-07 19:04:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 157 transitions, 1962 flow [2024-02-07 19:04:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:53,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:53,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:53,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-07 19:04:53,740 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:53,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1162341053, now seen corresponding path program 12 times [2024-02-07 19:04:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:53,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010940065] [2024-02-07 19:04:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:53,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:53,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010940065] [2024-02-07 19:04:53,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010940065] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:53,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:53,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089090510] [2024-02-07 19:04:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:53,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:53,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:53,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:53,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 157 transitions, 1962 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:53,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:53,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:53,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:55,419 INFO L124 PetriNetUnfolderBase]: 4757/9294 cut-off events. [2024-02-07 19:04:55,420 INFO L125 PetriNetUnfolderBase]: For 41785/41785 co-relation queries the response was YES. [2024-02-07 19:04:55,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30823 conditions, 9294 events. 4757/9294 cut-off events. For 41785/41785 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75207 event pairs, 2006 based on Foata normal form. 8/9010 useless extension candidates. Maximal degree in co-relation 30764. Up to 6161 conditions per place. [2024-02-07 19:04:55,542 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 206 selfloop transitions, 44 changer transitions 0/264 dead transitions. [2024-02-07 19:04:55,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 264 transitions, 3123 flow [2024-02-07 19:04:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:04:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:04:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-02-07 19:04:55,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2024-02-07 19:04:55,544 INFO L175 Difference]: Start difference. First operand has 185 places, 157 transitions, 1962 flow. Second operand 10 states and 285 transitions. [2024-02-07 19:04:55,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 264 transitions, 3123 flow [2024-02-07 19:04:55,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 264 transitions, 3034 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-07 19:04:55,739 INFO L231 Difference]: Finished difference. Result has 197 places, 165 transitions, 2184 flow [2024-02-07 19:04:55,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2184, PETRI_PLACES=197, PETRI_TRANSITIONS=165} [2024-02-07 19:04:55,739 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 129 predicate places. [2024-02-07 19:04:55,739 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 165 transitions, 2184 flow [2024-02-07 19:04:55,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:55,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:55,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:55,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-02-07 19:04:55,740 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:55,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:55,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1724536447, now seen corresponding path program 13 times [2024-02-07 19:04:55,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:55,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893787662] [2024-02-07 19:04:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:55,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:55,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:55,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893787662] [2024-02-07 19:04:55,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893787662] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:55,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:55,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:55,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749203093] [2024-02-07 19:04:55,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:55,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:55,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:55,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:55,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 165 transitions, 2184 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:55,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:57,297 INFO L124 PetriNetUnfolderBase]: 5139/10080 cut-off events. [2024-02-07 19:04:57,298 INFO L125 PetriNetUnfolderBase]: For 51297/51297 co-relation queries the response was YES. [2024-02-07 19:04:57,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33813 conditions, 10080 events. 5139/10080 cut-off events. For 51297/51297 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 83355 event pairs, 1742 based on Foata normal form. 8/9764 useless extension candidates. Maximal degree in co-relation 33748. Up to 5143 conditions per place. [2024-02-07 19:04:57,402 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 200 selfloop transitions, 55 changer transitions 0/269 dead transitions. [2024-02-07 19:04:57,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 269 transitions, 3368 flow [2024-02-07 19:04:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:04:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:04:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-02-07 19:04:57,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2024-02-07 19:04:57,404 INFO L175 Difference]: Start difference. First operand has 197 places, 165 transitions, 2184 flow. Second operand 10 states and 285 transitions. [2024-02-07 19:04:57,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 269 transitions, 3368 flow [2024-02-07 19:04:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 269 transitions, 3224 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-02-07 19:04:57,614 INFO L231 Difference]: Finished difference. Result has 209 places, 171 transitions, 2348 flow [2024-02-07 19:04:57,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2348, PETRI_PLACES=209, PETRI_TRANSITIONS=171} [2024-02-07 19:04:57,615 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 141 predicate places. [2024-02-07 19:04:57,615 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 171 transitions, 2348 flow [2024-02-07 19:04:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:57,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:57,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:57,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-07 19:04:57,616 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:57,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -5888093, now seen corresponding path program 14 times [2024-02-07 19:04:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:57,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961263466] [2024-02-07 19:04:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:57,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961263466] [2024-02-07 19:04:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961263466] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:57,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908005569] [2024-02-07 19:04:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:57,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:57,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:57,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:57,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 171 transitions, 2348 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:57,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:57,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:57,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:04:59,073 INFO L124 PetriNetUnfolderBase]: 5127/10040 cut-off events. [2024-02-07 19:04:59,073 INFO L125 PetriNetUnfolderBase]: For 55131/55131 co-relation queries the response was YES. [2024-02-07 19:04:59,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33986 conditions, 10040 events. 5127/10040 cut-off events. For 55131/55131 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 82511 event pairs, 2360 based on Foata normal form. 8/9724 useless extension candidates. Maximal degree in co-relation 33916. Up to 7276 conditions per place. [2024-02-07 19:04:59,187 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 171 selfloop transitions, 47 changer transitions 0/232 dead transitions. [2024-02-07 19:04:59,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 232 transitions, 3098 flow [2024-02-07 19:04:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:04:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:04:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-02-07 19:04:59,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495967741935484 [2024-02-07 19:04:59,188 INFO L175 Difference]: Start difference. First operand has 209 places, 171 transitions, 2348 flow. Second operand 8 states and 223 transitions. [2024-02-07 19:04:59,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 232 transitions, 3098 flow [2024-02-07 19:04:59,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 232 transitions, 2969 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-02-07 19:04:59,410 INFO L231 Difference]: Finished difference. Result has 215 places, 172 transitions, 2339 flow [2024-02-07 19:04:59,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2339, PETRI_PLACES=215, PETRI_TRANSITIONS=172} [2024-02-07 19:04:59,410 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2024-02-07 19:04:59,410 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 172 transitions, 2339 flow [2024-02-07 19:04:59,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:59,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:04:59,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:04:59,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-02-07 19:04:59,411 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:04:59,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:04:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash -835281855, now seen corresponding path program 15 times [2024-02-07 19:04:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:04:59,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694517153] [2024-02-07 19:04:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:04:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:04:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:04:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:04:59,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:04:59,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694517153] [2024-02-07 19:04:59,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694517153] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:04:59,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:04:59,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:04:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061270593] [2024-02-07 19:04:59,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:04:59,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:04:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:04:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:04:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:04:59,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:04:59,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 172 transitions, 2339 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:04:59,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:04:59,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:04:59,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:00,891 INFO L124 PetriNetUnfolderBase]: 5272/10437 cut-off events. [2024-02-07 19:05:00,892 INFO L125 PetriNetUnfolderBase]: For 53015/53015 co-relation queries the response was YES. [2024-02-07 19:05:01,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34582 conditions, 10437 events. 5272/10437 cut-off events. For 53015/53015 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 87471 event pairs, 1886 based on Foata normal form. 8/10089 useless extension candidates. Maximal degree in co-relation 34510. Up to 5143 conditions per place. [2024-02-07 19:05:01,094 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 199 selfloop transitions, 47 changer transitions 0/260 dead transitions. [2024-02-07 19:05:01,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 260 transitions, 3318 flow [2024-02-07 19:05:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:05:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:05:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-02-07 19:05:01,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-02-07 19:05:01,095 INFO L175 Difference]: Start difference. First operand has 215 places, 172 transitions, 2339 flow. Second operand 8 states and 238 transitions. [2024-02-07 19:05:01,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 260 transitions, 3318 flow [2024-02-07 19:05:01,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 260 transitions, 3203 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-02-07 19:05:01,364 INFO L231 Difference]: Finished difference. Result has 219 places, 173 transitions, 2364 flow [2024-02-07 19:05:01,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2364, PETRI_PLACES=219, PETRI_TRANSITIONS=173} [2024-02-07 19:05:01,365 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 151 predicate places. [2024-02-07 19:05:01,365 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 173 transitions, 2364 flow [2024-02-07 19:05:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:01,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:01,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:01,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-02-07 19:05:01,366 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:01,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1857465915, now seen corresponding path program 16 times [2024-02-07 19:05:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195962091] [2024-02-07 19:05:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:01,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:01,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195962091] [2024-02-07 19:05:01,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195962091] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:01,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:01,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:01,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146792035] [2024-02-07 19:05:01,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:01,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:01,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:01,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:01,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 173 transitions, 2364 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:01,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:01,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:01,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:02,875 INFO L124 PetriNetUnfolderBase]: 5260/10413 cut-off events. [2024-02-07 19:05:02,875 INFO L125 PetriNetUnfolderBase]: For 49651/49651 co-relation queries the response was YES. [2024-02-07 19:05:02,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34202 conditions, 10413 events. 5260/10413 cut-off events. For 49651/49651 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 87294 event pairs, 1926 based on Foata normal form. 8/10065 useless extension candidates. Maximal degree in co-relation 34128. Up to 5143 conditions per place. [2024-02-07 19:05:02,985 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 201 selfloop transitions, 46 changer transitions 0/261 dead transitions. [2024-02-07 19:05:02,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 261 transitions, 3328 flow [2024-02-07 19:05:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:05:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:05:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-02-07 19:05:02,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-02-07 19:05:02,987 INFO L175 Difference]: Start difference. First operand has 219 places, 173 transitions, 2364 flow. Second operand 8 states and 238 transitions. [2024-02-07 19:05:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 261 transitions, 3328 flow [2024-02-07 19:05:03,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 261 transitions, 3227 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-07 19:05:03,187 INFO L231 Difference]: Finished difference. Result has 224 places, 175 transitions, 2415 flow [2024-02-07 19:05:03,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=224, PETRI_TRANSITIONS=175} [2024-02-07 19:05:03,188 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 156 predicate places. [2024-02-07 19:05:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 175 transitions, 2415 flow [2024-02-07 19:05:03,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:03,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:03,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:03,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-02-07 19:05:03,188 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:03,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -280985069, now seen corresponding path program 17 times [2024-02-07 19:05:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335767137] [2024-02-07 19:05:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:03,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335767137] [2024-02-07 19:05:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335767137] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:03,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:03,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:03,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549542809] [2024-02-07 19:05:03,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:03,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:03,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:03,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:03,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 175 transitions, 2415 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:03,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:04,743 INFO L124 PetriNetUnfolderBase]: 5248/10379 cut-off events. [2024-02-07 19:05:04,743 INFO L125 PetriNetUnfolderBase]: For 50315/50315 co-relation queries the response was YES. [2024-02-07 19:05:04,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34121 conditions, 10379 events. 5248/10379 cut-off events. For 50315/50315 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 86723 event pairs, 2298 based on Foata normal form. 8/10031 useless extension candidates. Maximal degree in co-relation 34044. Up to 6978 conditions per place. [2024-02-07 19:05:04,878 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 189 selfloop transitions, 45 changer transitions 0/248 dead transitions. [2024-02-07 19:05:04,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 248 transitions, 3214 flow [2024-02-07 19:05:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:05:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:05:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-02-07 19:05:04,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657258064516129 [2024-02-07 19:05:04,880 INFO L175 Difference]: Start difference. First operand has 224 places, 175 transitions, 2415 flow. Second operand 8 states and 231 transitions. [2024-02-07 19:05:04,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 248 transitions, 3214 flow [2024-02-07 19:05:05,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 248 transitions, 3121 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-02-07 19:05:05,116 INFO L231 Difference]: Finished difference. Result has 228 places, 175 transitions, 2415 flow [2024-02-07 19:05:05,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=228, PETRI_TRANSITIONS=175} [2024-02-07 19:05:05,117 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 160 predicate places. [2024-02-07 19:05:05,117 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 175 transitions, 2415 flow [2024-02-07 19:05:05,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:05,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:05,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-02-07 19:05:05,117 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:05,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1470809461, now seen corresponding path program 18 times [2024-02-07 19:05:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:05,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656364202] [2024-02-07 19:05:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:05,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:05,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656364202] [2024-02-07 19:05:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656364202] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:05,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:05,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:05,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276614249] [2024-02-07 19:05:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:05:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:05,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:05:05,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:05:05,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:05,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 175 transitions, 2415 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:05,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:05,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:05,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:06,916 INFO L124 PetriNetUnfolderBase]: 6241/12337 cut-off events. [2024-02-07 19:05:06,916 INFO L125 PetriNetUnfolderBase]: For 66919/66919 co-relation queries the response was YES. [2024-02-07 19:05:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41759 conditions, 12337 events. 6241/12337 cut-off events. For 66919/66919 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 106493 event pairs, 2526 based on Foata normal form. 8/11926 useless extension candidates. Maximal degree in co-relation 41681. Up to 7642 conditions per place. [2024-02-07 19:05:07,078 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 229 selfloop transitions, 36 changer transitions 0/279 dead transitions. [2024-02-07 19:05:07,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 279 transitions, 3780 flow [2024-02-07 19:05:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:05:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:05:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-02-07 19:05:07,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-02-07 19:05:07,081 INFO L175 Difference]: Start difference. First operand has 228 places, 175 transitions, 2415 flow. Second operand 10 states and 280 transitions. [2024-02-07 19:05:07,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 279 transitions, 3780 flow [2024-02-07 19:05:07,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 279 transitions, 3665 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 19:05:07,493 INFO L231 Difference]: Finished difference. Result has 234 places, 191 transitions, 2791 flow [2024-02-07 19:05:07,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2791, PETRI_PLACES=234, PETRI_TRANSITIONS=191} [2024-02-07 19:05:07,494 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 166 predicate places. [2024-02-07 19:05:07,495 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 191 transitions, 2791 flow [2024-02-07 19:05:07,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:07,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:07,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:07,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-02-07 19:05:07,496 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:07,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash -279840197, now seen corresponding path program 19 times [2024-02-07 19:05:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:07,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158146160] [2024-02-07 19:05:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:07,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:07,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158146160] [2024-02-07 19:05:07,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158146160] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:07,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:07,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333412831] [2024-02-07 19:05:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:07,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:07,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 191 transitions, 2791 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:07,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:09,747 INFO L124 PetriNetUnfolderBase]: 6561/12971 cut-off events. [2024-02-07 19:05:09,748 INFO L125 PetriNetUnfolderBase]: For 72176/72176 co-relation queries the response was YES. [2024-02-07 19:05:10,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43909 conditions, 12971 events. 6561/12971 cut-off events. For 72176/72176 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 112895 event pairs, 2832 based on Foata normal form. 8/12544 useless extension candidates. Maximal degree in co-relation 43828. Up to 9350 conditions per place. [2024-02-07 19:05:10,232 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 246 selfloop transitions, 28 changer transitions 0/288 dead transitions. [2024-02-07 19:05:10,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 288 transitions, 3859 flow [2024-02-07 19:05:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:05:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:05:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-02-07 19:05:10,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-02-07 19:05:10,252 INFO L175 Difference]: Start difference. First operand has 234 places, 191 transitions, 2791 flow. Second operand 10 states and 284 transitions. [2024-02-07 19:05:10,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 288 transitions, 3859 flow [2024-02-07 19:05:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 288 transitions, 3725 flow, removed 64 selfloop flow, removed 1 redundant places. [2024-02-07 19:05:10,791 INFO L231 Difference]: Finished difference. Result has 247 places, 198 transitions, 2862 flow [2024-02-07 19:05:10,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2862, PETRI_PLACES=247, PETRI_TRANSITIONS=198} [2024-02-07 19:05:10,792 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 179 predicate places. [2024-02-07 19:05:10,792 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 198 transitions, 2862 flow [2024-02-07 19:05:10,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:10,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:10,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-02-07 19:05:10,793 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:10,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 711968693, now seen corresponding path program 20 times [2024-02-07 19:05:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180769755] [2024-02-07 19:05:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:11,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:11,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180769755] [2024-02-07 19:05:11,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180769755] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:11,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:11,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:11,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274198349] [2024-02-07 19:05:11,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:05:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:11,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:05:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:05:11,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:11,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 198 transitions, 2862 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:11,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:11,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:11,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:13,323 INFO L124 PetriNetUnfolderBase]: 6690/13256 cut-off events. [2024-02-07 19:05:13,324 INFO L125 PetriNetUnfolderBase]: For 72608/72608 co-relation queries the response was YES. [2024-02-07 19:05:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44473 conditions, 13256 events. 6690/13256 cut-off events. For 72608/72608 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 116094 event pairs, 2648 based on Foata normal form. 8/12813 useless extension candidates. Maximal degree in co-relation 44386. Up to 7642 conditions per place. [2024-02-07 19:05:13,973 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 244 selfloop transitions, 38 changer transitions 0/296 dead transitions. [2024-02-07 19:05:13,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 296 transitions, 3986 flow [2024-02-07 19:05:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:05:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:05:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-02-07 19:05:13,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629032258064516 [2024-02-07 19:05:13,991 INFO L175 Difference]: Start difference. First operand has 247 places, 198 transitions, 2862 flow. Second operand 10 states and 287 transitions. [2024-02-07 19:05:13,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 296 transitions, 3986 flow [2024-02-07 19:05:14,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 296 transitions, 3911 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-02-07 19:05:14,588 INFO L231 Difference]: Finished difference. Result has 255 places, 200 transitions, 2942 flow [2024-02-07 19:05:14,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2942, PETRI_PLACES=255, PETRI_TRANSITIONS=200} [2024-02-07 19:05:14,590 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 187 predicate places. [2024-02-07 19:05:14,590 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 200 transitions, 2942 flow [2024-02-07 19:05:14,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:14,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:14,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:14,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-02-07 19:05:14,591 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:14,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash 147006233, now seen corresponding path program 21 times [2024-02-07 19:05:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655465101] [2024-02-07 19:05:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:14,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:14,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655465101] [2024-02-07 19:05:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655465101] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268665983] [2024-02-07 19:05:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:14,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:05:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:05:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:05:14,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 200 transitions, 2942 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:14,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:14,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:17,410 INFO L124 PetriNetUnfolderBase]: 6819/13531 cut-off events. [2024-02-07 19:05:17,411 INFO L125 PetriNetUnfolderBase]: For 77564/77564 co-relation queries the response was YES. [2024-02-07 19:05:17,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45476 conditions, 13531 events. 6819/13531 cut-off events. For 77564/77564 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 119226 event pairs, 2676 based on Foata normal form. 8/13072 useless extension candidates. Maximal degree in co-relation 45386. Up to 7642 conditions per place. [2024-02-07 19:05:17,592 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 265 selfloop transitions, 40 changer transitions 0/319 dead transitions. [2024-02-07 19:05:17,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 319 transitions, 4160 flow [2024-02-07 19:05:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:05:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:05:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 19:05:17,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45564516129032256 [2024-02-07 19:05:17,596 INFO L175 Difference]: Start difference. First operand has 255 places, 200 transitions, 2942 flow. Second operand 12 states and 339 transitions. [2024-02-07 19:05:17,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 319 transitions, 4160 flow [2024-02-07 19:05:18,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 319 transitions, 4087 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-02-07 19:05:18,170 INFO L231 Difference]: Finished difference. Result has 264 places, 201 transitions, 2971 flow [2024-02-07 19:05:18,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2971, PETRI_PLACES=264, PETRI_TRANSITIONS=201} [2024-02-07 19:05:18,172 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 196 predicate places. [2024-02-07 19:05:18,172 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 201 transitions, 2971 flow [2024-02-07 19:05:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:18,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:18,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-02-07 19:05:18,173 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:18,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash -795631065, now seen corresponding path program 22 times [2024-02-07 19:05:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:18,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508549714] [2024-02-07 19:05:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:18,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508549714] [2024-02-07 19:05:18,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508549714] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:18,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:18,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849291088] [2024-02-07 19:05:18,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:18,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:18,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:18,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:18,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 201 transitions, 2971 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:18,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:18,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:18,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:22,001 INFO L124 PetriNetUnfolderBase]: 6948/13822 cut-off events. [2024-02-07 19:05:22,002 INFO L125 PetriNetUnfolderBase]: For 79361/79361 co-relation queries the response was YES. [2024-02-07 19:05:22,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46278 conditions, 13822 events. 6948/13822 cut-off events. For 79361/79361 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 122510 event pairs, 2672 based on Foata normal form. 8/13347 useless extension candidates. Maximal degree in co-relation 46186. Up to 7642 conditions per place. [2024-02-07 19:05:22,187 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 239 selfloop transitions, 37 changer transitions 0/290 dead transitions. [2024-02-07 19:05:22,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 290 transitions, 4021 flow [2024-02-07 19:05:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:05:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:05:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-02-07 19:05:22,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2024-02-07 19:05:22,190 INFO L175 Difference]: Start difference. First operand has 264 places, 201 transitions, 2971 flow. Second operand 9 states and 262 transitions. [2024-02-07 19:05:22,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 290 transitions, 4021 flow [2024-02-07 19:05:22,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 290 transitions, 3950 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-02-07 19:05:22,939 INFO L231 Difference]: Finished difference. Result has 268 places, 203 transitions, 3053 flow [2024-02-07 19:05:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3053, PETRI_PLACES=268, PETRI_TRANSITIONS=203} [2024-02-07 19:05:22,945 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 200 predicate places. [2024-02-07 19:05:22,945 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 203 transitions, 3053 flow [2024-02-07 19:05:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:22,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-02-07 19:05:22,946 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:22,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1067039063, now seen corresponding path program 23 times [2024-02-07 19:05:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191831433] [2024-02-07 19:05:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191831433] [2024-02-07 19:05:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191831433] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:23,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:23,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:23,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309723943] [2024-02-07 19:05:23,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:23,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:23,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 203 transitions, 3053 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:23,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:23,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:23,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:27,710 INFO L124 PetriNetUnfolderBase]: 7126/14240 cut-off events. [2024-02-07 19:05:27,711 INFO L125 PetriNetUnfolderBase]: For 87129/87129 co-relation queries the response was YES. [2024-02-07 19:05:27,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47721 conditions, 14240 events. 7126/14240 cut-off events. For 87129/87129 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127305 event pairs, 2596 based on Foata normal form. 8/13733 useless extension candidates. Maximal degree in co-relation 47626. Up to 7642 conditions per place. [2024-02-07 19:05:27,928 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 238 selfloop transitions, 40 changer transitions 0/292 dead transitions. [2024-02-07 19:05:27,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 292 transitions, 4097 flow [2024-02-07 19:05:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:05:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:05:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-02-07 19:05:27,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2024-02-07 19:05:27,930 INFO L175 Difference]: Start difference. First operand has 268 places, 203 transitions, 3053 flow. Second operand 9 states and 262 transitions. [2024-02-07 19:05:27,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 292 transitions, 4097 flow [2024-02-07 19:05:28,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 292 transitions, 3980 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-02-07 19:05:28,615 INFO L231 Difference]: Finished difference. Result has 274 places, 205 transitions, 3088 flow [2024-02-07 19:05:28,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3088, PETRI_PLACES=274, PETRI_TRANSITIONS=205} [2024-02-07 19:05:28,621 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 206 predicate places. [2024-02-07 19:05:28,621 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 205 transitions, 3088 flow [2024-02-07 19:05:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:28,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:28,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-02-07 19:05:28,622 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:28,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1469889079, now seen corresponding path program 24 times [2024-02-07 19:05:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:28,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845557630] [2024-02-07 19:05:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:28,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:29,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845557630] [2024-02-07 19:05:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845557630] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:29,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146719486] [2024-02-07 19:05:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:29,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:29,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:29,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 205 transitions, 3088 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:29,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:29,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:29,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:32,212 INFO L124 PetriNetUnfolderBase]: 7114/14234 cut-off events. [2024-02-07 19:05:32,213 INFO L125 PetriNetUnfolderBase]: For 86769/86769 co-relation queries the response was YES. [2024-02-07 19:05:32,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47482 conditions, 14234 events. 7114/14234 cut-off events. For 86769/86769 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127054 event pairs, 3352 based on Foata normal form. 8/13727 useless extension candidates. Maximal degree in co-relation 47384. Up to 10907 conditions per place. [2024-02-07 19:05:32,406 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 225 selfloop transitions, 26 changer transitions 0/265 dead transitions. [2024-02-07 19:05:32,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 265 transitions, 3827 flow [2024-02-07 19:05:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:05:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:05:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-02-07 19:05:32,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-02-07 19:05:32,408 INFO L175 Difference]: Start difference. First operand has 274 places, 205 transitions, 3088 flow. Second operand 9 states and 244 transitions. [2024-02-07 19:05:32,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 265 transitions, 3827 flow [2024-02-07 19:05:33,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 265 transitions, 3766 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-02-07 19:05:33,151 INFO L231 Difference]: Finished difference. Result has 280 places, 207 transitions, 3123 flow [2024-02-07 19:05:33,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3123, PETRI_PLACES=280, PETRI_TRANSITIONS=207} [2024-02-07 19:05:33,152 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 212 predicate places. [2024-02-07 19:05:33,152 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 207 transitions, 3123 flow [2024-02-07 19:05:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:33,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:33,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-02-07 19:05:33,153 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:33,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash -731479799, now seen corresponding path program 25 times [2024-02-07 19:05:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224042678] [2024-02-07 19:05:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224042678] [2024-02-07 19:05:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224042678] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:33,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:33,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993256878] [2024-02-07 19:05:33,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:33,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:33,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 207 transitions, 3123 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:33,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:33,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:33,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:36,707 INFO L124 PetriNetUnfolderBase]: 7102/14202 cut-off events. [2024-02-07 19:05:36,707 INFO L125 PetriNetUnfolderBase]: For 83120/83120 co-relation queries the response was YES. [2024-02-07 19:05:36,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47407 conditions, 14202 events. 7102/14202 cut-off events. For 83120/83120 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127000 event pairs, 2656 based on Foata normal form. 8/13695 useless extension candidates. Maximal degree in co-relation 47306. Up to 7642 conditions per place. [2024-02-07 19:05:36,867 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 233 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-02-07 19:05:36,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 295 transitions, 4150 flow [2024-02-07 19:05:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:05:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:05:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-02-07 19:05:36,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-02-07 19:05:36,869 INFO L175 Difference]: Start difference. First operand has 280 places, 207 transitions, 3123 flow. Second operand 10 states and 284 transitions. [2024-02-07 19:05:36,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 295 transitions, 4150 flow [2024-02-07 19:05:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 295 transitions, 4100 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-02-07 19:05:37,340 INFO L231 Difference]: Finished difference. Result has 288 places, 209 transitions, 3243 flow [2024-02-07 19:05:37,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3243, PETRI_PLACES=288, PETRI_TRANSITIONS=209} [2024-02-07 19:05:37,341 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 220 predicate places. [2024-02-07 19:05:37,341 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 209 transitions, 3243 flow [2024-02-07 19:05:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:37,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:37,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:37,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-02-07 19:05:37,341 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:37,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash 217955657, now seen corresponding path program 26 times [2024-02-07 19:05:37,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:37,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604056153] [2024-02-07 19:05:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:37,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604056153] [2024-02-07 19:05:37,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604056153] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:37,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:37,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044302126] [2024-02-07 19:05:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:37,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:05:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:37,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:05:37,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:05:37,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 209 transitions, 3243 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:37,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:37,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:40,180 INFO L124 PetriNetUnfolderBase]: 7090/14180 cut-off events. [2024-02-07 19:05:40,180 INFO L125 PetriNetUnfolderBase]: For 86281/86281 co-relation queries the response was YES. [2024-02-07 19:05:40,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47719 conditions, 14180 events. 7090/14180 cut-off events. For 86281/86281 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 126829 event pairs, 2772 based on Foata normal form. 8/13673 useless extension candidates. Maximal degree in co-relation 47616. Up to 7642 conditions per place. [2024-02-07 19:05:40,610 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 241 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-02-07 19:05:40,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 294 transitions, 4194 flow [2024-02-07 19:05:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:05:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:05:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2024-02-07 19:05:40,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442815249266862 [2024-02-07 19:05:40,611 INFO L175 Difference]: Start difference. First operand has 288 places, 209 transitions, 3243 flow. Second operand 11 states and 303 transitions. [2024-02-07 19:05:40,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 294 transitions, 4194 flow [2024-02-07 19:05:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 294 transitions, 4151 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-02-07 19:05:41,107 INFO L231 Difference]: Finished difference. Result has 295 places, 209 transitions, 3281 flow [2024-02-07 19:05:41,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3281, PETRI_PLACES=295, PETRI_TRANSITIONS=209} [2024-02-07 19:05:41,107 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 227 predicate places. [2024-02-07 19:05:41,107 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 209 transitions, 3281 flow [2024-02-07 19:05:41,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:41,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:41,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:41,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-02-07 19:05:41,108 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:41,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:41,109 INFO L85 PathProgramCache]: Analyzing trace with hash -898381509, now seen corresponding path program 27 times [2024-02-07 19:05:41,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:41,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528137233] [2024-02-07 19:05:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:41,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528137233] [2024-02-07 19:05:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528137233] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:41,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:41,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:41,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975727653] [2024-02-07 19:05:41,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:41,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:41,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:41,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 209 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:41,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:41,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:41,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:43,745 INFO L124 PetriNetUnfolderBase]: 7078/14200 cut-off events. [2024-02-07 19:05:43,745 INFO L125 PetriNetUnfolderBase]: For 86727/86727 co-relation queries the response was YES. [2024-02-07 19:05:43,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47744 conditions, 14200 events. 7078/14200 cut-off events. For 86727/86727 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127093 event pairs, 3160 based on Foata normal form. 8/13693 useless extension candidates. Maximal degree in co-relation 47640. Up to 10221 conditions per place. [2024-02-07 19:05:43,906 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 238 selfloop transitions, 28 changer transitions 0/280 dead transitions. [2024-02-07 19:05:43,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 280 transitions, 4073 flow [2024-02-07 19:05:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:05:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:05:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-02-07 19:05:43,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45340501792114696 [2024-02-07 19:05:43,908 INFO L175 Difference]: Start difference. First operand has 295 places, 209 transitions, 3281 flow. Second operand 9 states and 253 transitions. [2024-02-07 19:05:43,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 280 transitions, 4073 flow [2024-02-07 19:05:44,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 280 transitions, 4014 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 19:05:44,835 INFO L231 Difference]: Finished difference. Result has 298 places, 209 transitions, 3281 flow [2024-02-07 19:05:44,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3281, PETRI_PLACES=298, PETRI_TRANSITIONS=209} [2024-02-07 19:05:44,835 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 230 predicate places. [2024-02-07 19:05:44,835 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 209 transitions, 3281 flow [2024-02-07 19:05:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:44,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:44,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:44,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-02-07 19:05:44,836 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:44,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2118887347, now seen corresponding path program 28 times [2024-02-07 19:05:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545335771] [2024-02-07 19:05:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545335771] [2024-02-07 19:05:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545335771] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:44,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:44,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396468415] [2024-02-07 19:05:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:44,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:44,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 209 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:44,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:44,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:44,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:47,564 INFO L124 PetriNetUnfolderBase]: 7082/14080 cut-off events. [2024-02-07 19:05:47,564 INFO L125 PetriNetUnfolderBase]: For 85273/85273 co-relation queries the response was YES. [2024-02-07 19:05:47,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47583 conditions, 14080 events. 7082/14080 cut-off events. For 85273/85273 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 124778 event pairs, 4695 based on Foata normal form. 8/13529 useless extension candidates. Maximal degree in co-relation 47478. Up to 9743 conditions per place. [2024-02-07 19:05:47,703 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 201 selfloop transitions, 70 changer transitions 0/285 dead transitions. [2024-02-07 19:05:47,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 285 transitions, 4315 flow [2024-02-07 19:05:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:05:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:05:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-02-07 19:05:47,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2024-02-07 19:05:47,705 INFO L175 Difference]: Start difference. First operand has 298 places, 209 transitions, 3281 flow. Second operand 8 states and 233 transitions. [2024-02-07 19:05:47,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 285 transitions, 4315 flow [2024-02-07 19:05:48,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 285 transitions, 4270 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-02-07 19:05:48,186 INFO L231 Difference]: Finished difference. Result has 304 places, 213 transitions, 3478 flow [2024-02-07 19:05:48,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=304, PETRI_TRANSITIONS=213} [2024-02-07 19:05:48,187 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 236 predicate places. [2024-02-07 19:05:48,187 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 213 transitions, 3478 flow [2024-02-07 19:05:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:48,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:48,187 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, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-02-07 19:05:48,187 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:48,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash 616380721, now seen corresponding path program 29 times [2024-02-07 19:05:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:48,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403573199] [2024-02-07 19:05:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:48,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:48,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403573199] [2024-02-07 19:05:48,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403573199] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:48,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:48,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:48,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039602311] [2024-02-07 19:05:48,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:48,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:48,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:48,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:48,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:48,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 213 transitions, 3478 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:48,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:48,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:48,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:51,107 INFO L124 PetriNetUnfolderBase]: 7966/15869 cut-off events. [2024-02-07 19:05:51,107 INFO L125 PetriNetUnfolderBase]: For 116891/116891 co-relation queries the response was YES. [2024-02-07 19:05:51,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54645 conditions, 15869 events. 7966/15869 cut-off events. For 116891/116891 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 144059 event pairs, 5105 based on Foata normal form. 8/15233 useless extension candidates. Maximal degree in co-relation 54536. Up to 10403 conditions per place. [2024-02-07 19:05:51,583 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 221 selfloop transitions, 68 changer transitions 0/303 dead transitions. [2024-02-07 19:05:51,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 303 transitions, 4765 flow [2024-02-07 19:05:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:05:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:05:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-02-07 19:05:51,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778225806451613 [2024-02-07 19:05:51,585 INFO L175 Difference]: Start difference. First operand has 304 places, 213 transitions, 3478 flow. Second operand 8 states and 237 transitions. [2024-02-07 19:05:51,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 303 transitions, 4765 flow [2024-02-07 19:05:52,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 303 transitions, 4423 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-02-07 19:05:52,162 INFO L231 Difference]: Finished difference. Result has 309 places, 217 transitions, 3424 flow [2024-02-07 19:05:52,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3424, PETRI_PLACES=309, PETRI_TRANSITIONS=217} [2024-02-07 19:05:52,163 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 241 predicate places. [2024-02-07 19:05:52,163 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 217 transitions, 3424 flow [2024-02-07 19:05:52,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:52,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:52,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:52,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-02-07 19:05:52,164 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:52,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:52,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2095761153, now seen corresponding path program 30 times [2024-02-07 19:05:52,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:52,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923514104] [2024-02-07 19:05:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923514104] [2024-02-07 19:05:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923514104] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:05:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669535588] [2024-02-07 19:05:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:05:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:05:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:05:52,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:52,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 217 transitions, 3424 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:52,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:52,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:52,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:55,045 INFO L124 PetriNetUnfolderBase]: 8315/16610 cut-off events. [2024-02-07 19:05:55,045 INFO L125 PetriNetUnfolderBase]: For 121825/121825 co-relation queries the response was YES. [2024-02-07 19:05:55,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56263 conditions, 16610 events. 8315/16610 cut-off events. For 121825/121825 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 152263 event pairs, 5667 based on Foata normal form. 8/15938 useless extension candidates. Maximal degree in co-relation 56152. Up to 11813 conditions per place. [2024-02-07 19:05:55,252 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 210 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-02-07 19:05:55,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 299 transitions, 4534 flow [2024-02-07 19:05:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:05:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:05:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-02-07 19:05:55,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-02-07 19:05:55,253 INFO L175 Difference]: Start difference. First operand has 309 places, 217 transitions, 3424 flow. Second operand 10 states and 274 transitions. [2024-02-07 19:05:55,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 299 transitions, 4534 flow [2024-02-07 19:05:56,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 299 transitions, 4276 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-02-07 19:05:56,245 INFO L231 Difference]: Finished difference. Result has 318 places, 222 transitions, 3453 flow [2024-02-07 19:05:56,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3453, PETRI_PLACES=318, PETRI_TRANSITIONS=222} [2024-02-07 19:05:56,246 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 250 predicate places. [2024-02-07 19:05:56,246 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 222 transitions, 3453 flow [2024-02-07 19:05:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:05:56,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:05:56,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-02-07 19:05:56,247 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:05:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:05:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1140072755, now seen corresponding path program 31 times [2024-02-07 19:05:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:05:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875599894] [2024-02-07 19:05:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:05:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:05:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:05:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:05:56,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:05:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875599894] [2024-02-07 19:05:56,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875599894] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:05:56,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:05:56,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:05:56,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723696091] [2024-02-07 19:05:56,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:05:56,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:05:56,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:05:56,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:05:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:05:56,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:05:56,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 222 transitions, 3453 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:05:56,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:05:56,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:05:56,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:05:59,200 INFO L124 PetriNetUnfolderBase]: 8477/17157 cut-off events. [2024-02-07 19:05:59,200 INFO L125 PetriNetUnfolderBase]: For 120438/120438 co-relation queries the response was YES. [2024-02-07 19:05:59,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56482 conditions, 17157 events. 8477/17157 cut-off events. For 120438/120438 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 160047 event pairs, 3093 based on Foata normal form. 8/16494 useless extension candidates. Maximal degree in co-relation 56369. Up to 11279 conditions per place. [2024-02-07 19:05:59,422 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 215 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2024-02-07 19:05:59,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 290 transitions, 4436 flow [2024-02-07 19:05:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:05:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:05:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-02-07 19:05:59,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47465437788018433 [2024-02-07 19:05:59,424 INFO L175 Difference]: Start difference. First operand has 318 places, 222 transitions, 3453 flow. Second operand 7 states and 206 transitions. [2024-02-07 19:05:59,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 290 transitions, 4436 flow [2024-02-07 19:06:00,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 290 transitions, 4264 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-02-07 19:06:00,122 INFO L231 Difference]: Finished difference. Result has 324 places, 224 transitions, 3467 flow [2024-02-07 19:06:00,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3467, PETRI_PLACES=324, PETRI_TRANSITIONS=224} [2024-02-07 19:06:00,123 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 256 predicate places. [2024-02-07 19:06:00,123 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 224 transitions, 3467 flow [2024-02-07 19:06:00,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:06:00,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:06:00,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:06:00,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-02-07 19:06:00,124 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 19:06:00,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:06:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash -54127029, now seen corresponding path program 32 times [2024-02-07 19:06:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:06:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471068137] [2024-02-07 19:06:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:06:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:06:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:06:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:06:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:06:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471068137] [2024-02-07 19:06:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471068137] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:06:00,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:06:00,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:06:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979784962] [2024-02-07 19:06:00,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:06:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:06:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:06:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:06:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:06:00,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 19:06:00,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 224 transitions, 3467 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:06:00,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:06:00,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 19:06:00,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand