./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:00:21,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:00:21,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:00:21,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:00:21,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:00:21,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:00:21,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:00:21,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:00:21,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:00:21,865 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:00:21,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:00:21,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:00:21,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:00:21,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:00:21,867 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:00:21,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:00:21,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:00:21,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:00:21,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:00:21,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:00:21,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:00:21,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:00:21,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:00:21,869 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:00:21,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:00:21,870 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:00:21,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:00:21,870 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:00:21,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:00:21,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:00:21,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:00:21,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:00:21,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:21,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:00:21,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:00:21,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:00:21,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:00:21,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:00:21,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:00:21,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:00:21,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:00:21,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:00:21,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:00:21,874 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:00:22,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:00:22,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:00:22,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:00:22,111 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:00:22,111 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:00:22,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 23:00:23,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:00:23,408 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:00:23,411 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 23:00:23,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22a39afe/e5eedd17f4994ab0b876164314cc489d/FLAG795a9a53b [2024-06-27 23:00:23,446 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22a39afe/e5eedd17f4994ab0b876164314cc489d [2024-06-27 23:00:23,448 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:00:23,449 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:00:23,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 23:00:23,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:00:23,521 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:00:23,523 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:23,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:00:23,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:00:23,528 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:23" (1/2) ... [2024-06-27 23:00:23,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e7b1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:23, skipping insertion in model container [2024-06-27 23:00:23,529 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:23" (1/2) ... [2024-06-27 23:00:23,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5523fc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:23, skipping insertion in model container [2024-06-27 23:00:23,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:23" (2/2) ... [2024-06-27 23:00:23,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e7b1c4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:23, skipping insertion in model container [2024-06-27 23:00:23,532 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:23" (2/2) ... [2024-06-27 23:00:23,533 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:00:23,550 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:00:23,552 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || (((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-27 23:00:23,552 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ! multithreaded || (((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-27 23:00:23,552 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:00:23,552 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-27 23:00:23,591 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:00:23,966 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:23,980 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:00:24,100 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:24,143 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:00:24,143 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24 WrapperNode [2024-06-27 23:00:24,143 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:24,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:24,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:00:24,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:00:24,150 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 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,174 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 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,200 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 158 [2024-06-27 23:00:24,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:24,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:00:24,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:00:24,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:00:24,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,251 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:00:24,251 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:00:24,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:00:24,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:00:24,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:00:24,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:24,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:00:24,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:00:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:00:24,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:00:24,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:00:24,375 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:00:24,376 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:00:24,376 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:00:24,376 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:00:24,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:00:24,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:00:24,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:00:24,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:00:24,378 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:00:24,518 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:00:24,520 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:00:24,789 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:00:24,791 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:00:24,976 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:00:24,976 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:00:24,978 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:24 BoogieIcfgContainer [2024-06-27 23:00:24,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:00:24,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:00:24,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:00:24,982 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:00:24,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:00:23" (1/4) ... [2024-06-27 23:00:24,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba78ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:00:24, skipping insertion in model container [2024-06-27 23:00:24,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:23" (2/4) ... [2024-06-27 23:00:24,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba78ed9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:00:24, skipping insertion in model container [2024-06-27 23:00:24,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (3/4) ... [2024-06-27 23:00:24,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba78ed9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:00:24, skipping insertion in model container [2024-06-27 23:00:24,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:24" (4/4) ... [2024-06-27 23:00:24,986 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 23:00:24,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:00:24,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 23:00:24,999 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:00:25,033 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:00:25,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-27 23:00:25,080 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-27 23:00:25,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:25,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:00:25,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-27 23:00:25,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-27 23:00:25,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:00:25,096 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;@f4ce86f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:00:25,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 23:00:25,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:00:25,099 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:00:25,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:25,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:25,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:00:25,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:25,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 409390742, now seen corresponding path program 1 times [2024-06-27 23:00:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:25,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462274240] [2024-06-27 23:00:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:25,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:25,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:25,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462274240] [2024-06-27 23:00:25,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462274240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:25,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:25,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:00:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144185556] [2024-06-27 23:00:25,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:00:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:00:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:00:25,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:25,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:25,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:25,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:25,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:26,063 INFO L124 PetriNetUnfolderBase]: 162/332 cut-off events. [2024-06-27 23:00:26,064 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 23:00:26,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 332 events. 162/332 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1338 event pairs, 97 based on Foata normal form. 1/322 useless extension candidates. Maximal degree in co-relation 632. Up to 288 conditions per place. [2024-06-27 23:00:26,069 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 21 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-27 23:00:26,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 117 flow [2024-06-27 23:00:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:00:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:00:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-27 23:00:26,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 23:00:26,090 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 56 transitions. [2024-06-27 23:00:26,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 117 flow [2024-06-27 23:00:26,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:26,109 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-27 23:00:26,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-27 23:00:26,114 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-27 23:00:26,114 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-27 23:00:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:26,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:26,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:00:26,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:26,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1711952367, now seen corresponding path program 1 times [2024-06-27 23:00:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:26,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106826662] [2024-06-27 23:00:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:26,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:26,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106826662] [2024-06-27 23:00:26,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106826662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:26,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:26,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:00:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501575053] [2024-06-27 23:00:26,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:00:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:00:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:00:26,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:26,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:26,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:26,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:26,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:26,698 INFO L124 PetriNetUnfolderBase]: 156/324 cut-off events. [2024-06-27 23:00:26,710 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-27 23:00:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 324 events. 156/324 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1309 event pairs, 61 based on Foata normal form. 4/324 useless extension candidates. Maximal degree in co-relation 692. Up to 260 conditions per place. [2024-06-27 23:00:26,715 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 26 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2024-06-27 23:00:26,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 163 flow [2024-06-27 23:00:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-06-27 23:00:26,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703125 [2024-06-27 23:00:26,718 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 73 transitions. [2024-06-27 23:00:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 163 flow [2024-06-27 23:00:26,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:26,722 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-27 23:00:26,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-27 23:00:26,723 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-27 23:00:26,730 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-27 23:00:26,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:26,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:26,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:26,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:00:26,731 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash -213731472, now seen corresponding path program 1 times [2024-06-27 23:00:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:26,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714981297] [2024-06-27 23:00:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714981297] [2024-06-27 23:00:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714981297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:27,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:27,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:27,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045145018] [2024-06-27 23:00:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:27,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:27,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:27,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:27,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:27,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:27,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:28,113 INFO L124 PetriNetUnfolderBase]: 149/308 cut-off events. [2024-06-27 23:00:28,128 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-06-27 23:00:28,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 308 events. 149/308 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1195 event pairs, 24 based on Foata normal form. 6/308 useless extension candidates. Maximal degree in co-relation 723. Up to 220 conditions per place. [2024-06-27 23:00:28,130 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 27 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-06-27 23:00:28,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 185 flow [2024-06-27 23:00:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 23:00:28,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 23:00:28,134 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 5 states and 85 transitions. [2024-06-27 23:00:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 185 flow [2024-06-27 23:00:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 176 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:28,137 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 98 flow [2024-06-27 23:00:28,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-06-27 23:00:28,138 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-27 23:00:28,138 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 98 flow [2024-06-27 23:00:28,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:28,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:28,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:28,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:00:28,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:28,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash -682473315, now seen corresponding path program 1 times [2024-06-27 23:00:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:28,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135577646] [2024-06-27 23:00:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:28,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135577646] [2024-06-27 23:00:28,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135577646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:28,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:28,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:00:28,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632463650] [2024-06-27 23:00:28,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:28,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:00:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:00:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:00:28,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:28,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:28,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:28,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:28,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:28,671 INFO L124 PetriNetUnfolderBase]: 147/305 cut-off events. [2024-06-27 23:00:28,684 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-06-27 23:00:28,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 305 events. 147/305 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1194 event pairs, 68 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 756. Up to 259 conditions per place. [2024-06-27 23:00:28,686 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 23 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-27 23:00:28,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 172 flow [2024-06-27 23:00:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-06-27 23:00:28,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-27 23:00:28,690 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 98 flow. Second operand 4 states and 67 transitions. [2024-06-27 23:00:28,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 172 flow [2024-06-27 23:00:28,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 158 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:28,693 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 109 flow [2024-06-27 23:00:28,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-06-27 23:00:28,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-27 23:00:28,695 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 109 flow [2024-06-27 23:00:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:28,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:28,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:28,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:00:28,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:28,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 318165300, now seen corresponding path program 1 times [2024-06-27 23:00:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165579770] [2024-06-27 23:00:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:28,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:29,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165579770] [2024-06-27 23:00:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165579770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:29,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:29,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:29,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675484720] [2024-06-27 23:00:29,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:29,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:29,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:29,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:29,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:29,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:29,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:29,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:29,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:29,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:29,356 INFO L124 PetriNetUnfolderBase]: 172/335 cut-off events. [2024-06-27 23:00:29,356 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-06-27 23:00:29,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 335 events. 172/335 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1288 event pairs, 82 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 897. Up to 298 conditions per place. [2024-06-27 23:00:29,364 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 25 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-06-27 23:00:29,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 195 flow [2024-06-27 23:00:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-27 23:00:29,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 23:00:29,366 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 109 flow. Second operand 5 states and 76 transitions. [2024-06-27 23:00:29,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 195 flow [2024-06-27 23:00:29,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 186 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:29,385 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 131 flow [2024-06-27 23:00:29,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-27 23:00:29,390 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-27 23:00:29,390 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 131 flow [2024-06-27 23:00:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:29,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:29,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:29,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:00:29,392 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:29,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash 934048596, now seen corresponding path program 1 times [2024-06-27 23:00:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:29,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389995020] [2024-06-27 23:00:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:29,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:29,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389995020] [2024-06-27 23:00:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389995020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:29,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:29,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:29,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778352281] [2024-06-27 23:00:29,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:29,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:29,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:29,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:29,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:29,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:29,725 INFO L124 PetriNetUnfolderBase]: 161/327 cut-off events. [2024-06-27 23:00:29,726 INFO L125 PetriNetUnfolderBase]: For 604/606 co-relation queries the response was YES. [2024-06-27 23:00:29,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 327 events. 161/327 cut-off events. For 604/606 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1279 event pairs, 63 based on Foata normal form. 3/330 useless extension candidates. Maximal degree in co-relation 932. Up to 257 conditions per place. [2024-06-27 23:00:29,727 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 28 selfloop transitions, 9 changer transitions 0/44 dead transitions. [2024-06-27 23:00:29,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 239 flow [2024-06-27 23:00:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-27 23:00:29,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 23:00:29,729 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 131 flow. Second operand 5 states and 84 transitions. [2024-06-27 23:00:29,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 239 flow [2024-06-27 23:00:29,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 224 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:29,731 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 155 flow [2024-06-27 23:00:29,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-27 23:00:29,732 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-27 23:00:29,732 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 155 flow [2024-06-27 23:00:29,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:29,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:29,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:29,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:00:29,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:29,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash -982913854, now seen corresponding path program 2 times [2024-06-27 23:00:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:29,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406530434] [2024-06-27 23:00:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:29,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:29,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406530434] [2024-06-27 23:00:29,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406530434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:29,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:29,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560062624] [2024-06-27 23:00:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:29,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:29,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:29,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:29,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:29,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:30,069 INFO L124 PetriNetUnfolderBase]: 164/333 cut-off events. [2024-06-27 23:00:30,070 INFO L125 PetriNetUnfolderBase]: For 821/823 co-relation queries the response was YES. [2024-06-27 23:00:30,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 333 events. 164/333 cut-off events. For 821/823 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1306 event pairs, 66 based on Foata normal form. 3/336 useless extension candidates. Maximal degree in co-relation 1026. Up to 252 conditions per place. [2024-06-27 23:00:30,071 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 26 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2024-06-27 23:00:30,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 281 flow [2024-06-27 23:00:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 23:00:30,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 23:00:30,073 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 155 flow. Second operand 5 states and 85 transitions. [2024-06-27 23:00:30,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 281 flow [2024-06-27 23:00:30,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 279 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:30,075 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 219 flow [2024-06-27 23:00:30,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2024-06-27 23:00:30,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-27 23:00:30,076 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 219 flow [2024-06-27 23:00:30,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:30,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:30,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:00:30,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:30,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1273191324, now seen corresponding path program 1 times [2024-06-27 23:00:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:30,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802990528] [2024-06-27 23:00:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:30,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802990528] [2024-06-27 23:00:30,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802990528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:30,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507662435] [2024-06-27 23:00:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:30,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:30,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:30,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:30,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:30,444 INFO L124 PetriNetUnfolderBase]: 176/341 cut-off events. [2024-06-27 23:00:30,445 INFO L125 PetriNetUnfolderBase]: For 1068/1068 co-relation queries the response was YES. [2024-06-27 23:00:30,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 341 events. 176/341 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1313 event pairs, 62 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 1180. Up to 302 conditions per place. [2024-06-27 23:00:30,447 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 34 selfloop transitions, 9 changer transitions 0/48 dead transitions. [2024-06-27 23:00:30,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 331 flow [2024-06-27 23:00:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-27 23:00:30,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:00:30,448 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 219 flow. Second operand 6 states and 88 transitions. [2024-06-27 23:00:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 331 flow [2024-06-27 23:00:30,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 320 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:30,451 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 245 flow [2024-06-27 23:00:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2024-06-27 23:00:30,452 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-27 23:00:30,452 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 245 flow [2024-06-27 23:00:30,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:30,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:00:30,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:30,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash -743594364, now seen corresponding path program 1 times [2024-06-27 23:00:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74114189] [2024-06-27 23:00:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:30,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:30,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74114189] [2024-06-27 23:00:30,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74114189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:30,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845499969] [2024-06-27 23:00:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:30,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:30,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:30,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:30,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:30,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:30,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:30,960 INFO L124 PetriNetUnfolderBase]: 173/349 cut-off events. [2024-06-27 23:00:30,960 INFO L125 PetriNetUnfolderBase]: For 1404/1404 co-relation queries the response was YES. [2024-06-27 23:00:30,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 349 events. 173/349 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1388 event pairs, 61 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 1287. Up to 266 conditions per place. [2024-06-27 23:00:30,963 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 35 selfloop transitions, 20 changer transitions 0/61 dead transitions. [2024-06-27 23:00:30,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 452 flow [2024-06-27 23:00:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-27 23:00:30,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 23:00:30,964 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 245 flow. Second operand 8 states and 108 transitions. [2024-06-27 23:00:30,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 452 flow [2024-06-27 23:00:30,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 429 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:30,967 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 352 flow [2024-06-27 23:00:30,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=352, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-27 23:00:30,968 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-06-27 23:00:30,968 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 352 flow [2024-06-27 23:00:30,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:30,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:30,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:00:30,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:30,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash -640623402, now seen corresponding path program 2 times [2024-06-27 23:00:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:30,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148119450] [2024-06-27 23:00:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:30,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148119450] [2024-06-27 23:00:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148119450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:31,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:31,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656910383] [2024-06-27 23:00:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:31,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:31,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:31,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:31,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:31,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:31,276 INFO L124 PetriNetUnfolderBase]: 171/346 cut-off events. [2024-06-27 23:00:31,276 INFO L125 PetriNetUnfolderBase]: For 1700/1700 co-relation queries the response was YES. [2024-06-27 23:00:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 346 events. 171/346 cut-off events. For 1700/1700 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1374 event pairs, 60 based on Foata normal form. 1/346 useless extension candidates. Maximal degree in co-relation 1332. Up to 257 conditions per place. [2024-06-27 23:00:31,278 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 31 selfloop transitions, 22 changer transitions 0/59 dead transitions. [2024-06-27 23:00:31,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 476 flow [2024-06-27 23:00:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-27 23:00:31,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-27 23:00:31,280 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 352 flow. Second operand 5 states and 79 transitions. [2024-06-27 23:00:31,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 476 flow [2024-06-27 23:00:31,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 470 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:31,283 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 403 flow [2024-06-27 23:00:31,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-06-27 23:00:31,284 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-27 23:00:31,284 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 403 flow [2024-06-27 23:00:31,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:31,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:31,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:00:31,285 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:31,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1438586769, now seen corresponding path program 1 times [2024-06-27 23:00:31,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:31,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813060622] [2024-06-27 23:00:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:31,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:31,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813060622] [2024-06-27 23:00:31,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813060622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:31,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:31,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045000258] [2024-06-27 23:00:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:31,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:31,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:31,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:31,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 403 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:31,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:31,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:31,608 INFO L124 PetriNetUnfolderBase]: 188/365 cut-off events. [2024-06-27 23:00:31,609 INFO L125 PetriNetUnfolderBase]: For 2089/2089 co-relation queries the response was YES. [2024-06-27 23:00:31,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 365 events. 188/365 cut-off events. For 2089/2089 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1413 event pairs, 61 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 1485. Up to 299 conditions per place. [2024-06-27 23:00:31,611 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 39 selfloop transitions, 18 changer transitions 0/62 dead transitions. [2024-06-27 23:00:31,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 547 flow [2024-06-27 23:00:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 23:00:31,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 23:00:31,613 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 403 flow. Second operand 6 states and 92 transitions. [2024-06-27 23:00:31,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 547 flow [2024-06-27 23:00:31,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 511 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:31,616 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 422 flow [2024-06-27 23:00:31,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=422, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-06-27 23:00:31,617 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2024-06-27 23:00:31,617 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 422 flow [2024-06-27 23:00:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:31,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:31,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:00:31,618 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:31,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -370753158, now seen corresponding path program 3 times [2024-06-27 23:00:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042121570] [2024-06-27 23:00:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:31,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:31,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042121570] [2024-06-27 23:00:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042121570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113090844] [2024-06-27 23:00:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:31,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:31,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:31,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:31,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:32,067 INFO L124 PetriNetUnfolderBase]: 179/353 cut-off events. [2024-06-27 23:00:32,067 INFO L125 PetriNetUnfolderBase]: For 2424/2424 co-relation queries the response was YES. [2024-06-27 23:00:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 353 events. 179/353 cut-off events. For 2424/2424 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1384 event pairs, 57 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 1522. Up to 273 conditions per place. [2024-06-27 23:00:32,071 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 38 selfloop transitions, 17 changer transitions 0/63 dead transitions. [2024-06-27 23:00:32,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 564 flow [2024-06-27 23:00:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 23:00:32,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 23:00:32,072 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 422 flow. Second operand 5 states and 85 transitions. [2024-06-27 23:00:32,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 564 flow [2024-06-27 23:00:32,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 63 transitions, 525 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:32,076 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 442 flow [2024-06-27 23:00:32,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=442, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-06-27 23:00:32,077 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-27 23:00:32,077 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 442 flow [2024-06-27 23:00:32,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:32,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:32,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:32,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:00:32,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:32,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:32,078 INFO L85 PathProgramCache]: Analyzing trace with hash 814217107, now seen corresponding path program 2 times [2024-06-27 23:00:32,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:32,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856374620] [2024-06-27 23:00:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:32,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:32,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856374620] [2024-06-27 23:00:32,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856374620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:32,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:32,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:32,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524223105] [2024-06-27 23:00:32,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:32,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:32,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:32,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:32,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 442 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:32,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:32,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:32,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:32,401 INFO L124 PetriNetUnfolderBase]: 199/379 cut-off events. [2024-06-27 23:00:32,401 INFO L125 PetriNetUnfolderBase]: For 2889/2889 co-relation queries the response was YES. [2024-06-27 23:00:32,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 379 events. 199/379 cut-off events. For 2889/2889 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1471 event pairs, 62 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 1695. Up to 289 conditions per place. [2024-06-27 23:00:32,404 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 36 selfloop transitions, 27 changer transitions 0/68 dead transitions. [2024-06-27 23:00:32,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 644 flow [2024-06-27 23:00:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 23:00:32,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 23:00:32,405 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 442 flow. Second operand 6 states and 95 transitions. [2024-06-27 23:00:32,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 644 flow [2024-06-27 23:00:32,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 611 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:32,410 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 522 flow [2024-06-27 23:00:32,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=522, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-06-27 23:00:32,411 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-27 23:00:32,411 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 522 flow [2024-06-27 23:00:32,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:32,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:32,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:00:32,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:32,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash -902609571, now seen corresponding path program 3 times [2024-06-27 23:00:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:32,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513117292] [2024-06-27 23:00:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:32,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513117292] [2024-06-27 23:00:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513117292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:32,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192200714] [2024-06-27 23:00:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:32,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:32,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:32,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:32,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:32,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:32,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:32,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:32,728 INFO L124 PetriNetUnfolderBase]: 197/375 cut-off events. [2024-06-27 23:00:32,729 INFO L125 PetriNetUnfolderBase]: For 3309/3309 co-relation queries the response was YES. [2024-06-27 23:00:32,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 375 events. 197/375 cut-off events. For 3309/3309 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1443 event pairs, 65 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1788. Up to 287 conditions per place. [2024-06-27 23:00:32,731 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 39 selfloop transitions, 25 changer transitions 0/69 dead transitions. [2024-06-27 23:00:32,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 701 flow [2024-06-27 23:00:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 23:00:32,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 23:00:32,733 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 522 flow. Second operand 6 states and 95 transitions. [2024-06-27 23:00:32,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 701 flow [2024-06-27 23:00:32,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 653 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:32,742 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 538 flow [2024-06-27 23:00:32,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2024-06-27 23:00:32,743 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-06-27 23:00:32,743 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 538 flow [2024-06-27 23:00:32,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:32,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:32,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:00:32,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:32,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 813949980, now seen corresponding path program 4 times [2024-06-27 23:00:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:32,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914253710] [2024-06-27 23:00:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:32,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:33,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:33,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914253710] [2024-06-27 23:00:33,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914253710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:33,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:33,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:33,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372060857] [2024-06-27 23:00:33,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:33,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:33,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:33,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:33,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:33,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:33,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:33,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:33,336 INFO L124 PetriNetUnfolderBase]: 185/362 cut-off events. [2024-06-27 23:00:33,336 INFO L125 PetriNetUnfolderBase]: For 3710/3710 co-relation queries the response was YES. [2024-06-27 23:00:33,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 362 events. 185/362 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1429 event pairs, 62 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1750. Up to 263 conditions per place. [2024-06-27 23:00:33,338 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 37 selfloop transitions, 21 changer transitions 0/69 dead transitions. [2024-06-27 23:00:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 686 flow [2024-06-27 23:00:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 23:00:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 23:00:33,340 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 538 flow. Second operand 5 states and 85 transitions. [2024-06-27 23:00:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 686 flow [2024-06-27 23:00:33,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 646 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:33,347 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 570 flow [2024-06-27 23:00:33,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=570, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-06-27 23:00:33,347 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-06-27 23:00:33,347 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 570 flow [2024-06-27 23:00:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:33,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:33,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:00:33,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:33,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 814227027, now seen corresponding path program 1 times [2024-06-27 23:00:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530451814] [2024-06-27 23:00:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:33,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:33,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530451814] [2024-06-27 23:00:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530451814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098539714] [2024-06-27 23:00:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:33,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:33,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 570 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:33,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:33,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:33,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:33,936 INFO L124 PetriNetUnfolderBase]: 190/369 cut-off events. [2024-06-27 23:00:33,937 INFO L125 PetriNetUnfolderBase]: For 4182/4182 co-relation queries the response was YES. [2024-06-27 23:00:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 369 events. 190/369 cut-off events. For 4182/4182 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1447 event pairs, 99 based on Foata normal form. 3/371 useless extension candidates. Maximal degree in co-relation 1780. Up to 318 conditions per place. [2024-06-27 23:00:33,940 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 23:00:33,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 733 flow [2024-06-27 23:00:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-27 23:00:33,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:00:33,941 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 570 flow. Second operand 7 states and 100 transitions. [2024-06-27 23:00:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 733 flow [2024-06-27 23:00:33,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 681 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:33,947 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 544 flow [2024-06-27 23:00:33,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2024-06-27 23:00:33,948 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-06-27 23:00:33,948 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 544 flow [2024-06-27 23:00:33,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:33,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:33,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:33,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:00:33,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:33,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash -441972931, now seen corresponding path program 1 times [2024-06-27 23:00:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:33,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823205552] [2024-06-27 23:00:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:34,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823205552] [2024-06-27 23:00:34,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823205552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:34,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:34,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:34,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462792201] [2024-06-27 23:00:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:34,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:34,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:34,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:34,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:34,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:34,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:34,477 INFO L124 PetriNetUnfolderBase]: 190/375 cut-off events. [2024-06-27 23:00:34,477 INFO L125 PetriNetUnfolderBase]: For 5256/5259 co-relation queries the response was YES. [2024-06-27 23:00:34,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1886 conditions, 375 events. 190/375 cut-off events. For 5256/5259 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1524 event pairs, 38 based on Foata normal form. 3/374 useless extension candidates. Maximal degree in co-relation 1849. Up to 256 conditions per place. [2024-06-27 23:00:34,480 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 53 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-27 23:00:34,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 78 transitions, 725 flow [2024-06-27 23:00:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 23:00:34,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42410714285714285 [2024-06-27 23:00:34,481 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 544 flow. Second operand 7 states and 95 transitions. [2024-06-27 23:00:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 78 transitions, 725 flow [2024-06-27 23:00:34,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 697 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:34,488 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 569 flow [2024-06-27 23:00:34,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=569, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-06-27 23:00:34,489 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-27 23:00:34,489 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 569 flow [2024-06-27 23:00:34,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:34,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:34,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:34,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:00:34,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:34,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash -947467359, now seen corresponding path program 1 times [2024-06-27 23:00:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:34,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455868375] [2024-06-27 23:00:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:34,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455868375] [2024-06-27 23:00:34,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455868375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:34,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:34,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:34,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931977331] [2024-06-27 23:00:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:34,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:34,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:34,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 569 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:34,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:34,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:34,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:34,906 INFO L124 PetriNetUnfolderBase]: 195/376 cut-off events. [2024-06-27 23:00:34,906 INFO L125 PetriNetUnfolderBase]: For 4580/4580 co-relation queries the response was YES. [2024-06-27 23:00:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 376 events. 195/376 cut-off events. For 4580/4580 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1478 event pairs, 79 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1865. Up to 302 conditions per place. [2024-06-27 23:00:34,909 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 49 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2024-06-27 23:00:34,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 734 flow [2024-06-27 23:00:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-27 23:00:34,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 23:00:34,910 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 569 flow. Second operand 6 states and 94 transitions. [2024-06-27 23:00:34,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 734 flow [2024-06-27 23:00:34,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 693 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:34,917 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 579 flow [2024-06-27 23:00:34,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2024-06-27 23:00:34,917 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-27 23:00:34,917 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 579 flow [2024-06-27 23:00:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:34,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:34,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:00:34,918 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:34,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash -936742785, now seen corresponding path program 2 times [2024-06-27 23:00:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543882489] [2024-06-27 23:00:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:35,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543882489] [2024-06-27 23:00:35,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543882489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:35,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:35,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571216340] [2024-06-27 23:00:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:35,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:35,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:35,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:35,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:35,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:35,792 INFO L124 PetriNetUnfolderBase]: 199/396 cut-off events. [2024-06-27 23:00:35,792 INFO L125 PetriNetUnfolderBase]: For 6075/6075 co-relation queries the response was YES. [2024-06-27 23:00:35,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 396 events. 199/396 cut-off events. For 6075/6075 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1659 event pairs, 29 based on Foata normal form. 3/398 useless extension candidates. Maximal degree in co-relation 2000. Up to 238 conditions per place. [2024-06-27 23:00:35,795 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 51 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2024-06-27 23:00:35,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 820 flow [2024-06-27 23:00:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 23:00:35,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:00:35,797 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 579 flow. Second operand 7 states and 104 transitions. [2024-06-27 23:00:35,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 820 flow [2024-06-27 23:00:35,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 81 transitions, 750 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:35,817 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 585 flow [2024-06-27 23:00:35,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=585, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2024-06-27 23:00:35,818 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-27 23:00:35,818 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 585 flow [2024-06-27 23:00:35,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:35,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:35,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:00:35,818 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:35,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1978989581, now seen corresponding path program 2 times [2024-06-27 23:00:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237179038] [2024-06-27 23:00:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:36,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:36,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237179038] [2024-06-27 23:00:36,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237179038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:36,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:36,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817970820] [2024-06-27 23:00:36,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:36,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:36,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:36,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 585 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:36,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:36,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:36,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:36,319 INFO L124 PetriNetUnfolderBase]: 212/411 cut-off events. [2024-06-27 23:00:36,319 INFO L125 PetriNetUnfolderBase]: For 6316/6316 co-relation queries the response was YES. [2024-06-27 23:00:36,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 411 events. 212/411 cut-off events. For 6316/6316 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1677 event pairs, 54 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 2104. Up to 336 conditions per place. [2024-06-27 23:00:36,322 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 53 selfloop transitions, 20 changer transitions 0/78 dead transitions. [2024-06-27 23:00:36,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 771 flow [2024-06-27 23:00:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-27 23:00:36,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 23:00:36,323 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 585 flow. Second operand 6 states and 94 transitions. [2024-06-27 23:00:36,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 771 flow [2024-06-27 23:00:36,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 748 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:36,334 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 633 flow [2024-06-27 23:00:36,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=633, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2024-06-27 23:00:36,334 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-27 23:00:36,334 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 633 flow [2024-06-27 23:00:36,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:36,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:36,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:00:36,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:36,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1646515263, now seen corresponding path program 1 times [2024-06-27 23:00:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:36,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89207289] [2024-06-27 23:00:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:36,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:36,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89207289] [2024-06-27 23:00:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89207289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:36,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:36,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:36,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410534704] [2024-06-27 23:00:36,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:36,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:36,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:36,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 633 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:36,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:36,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:36,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:36,701 INFO L124 PetriNetUnfolderBase]: 215/416 cut-off events. [2024-06-27 23:00:36,701 INFO L125 PetriNetUnfolderBase]: For 6851/6851 co-relation queries the response was YES. [2024-06-27 23:00:36,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 416 events. 215/416 cut-off events. For 6851/6851 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1711 event pairs, 53 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 2192. Up to 346 conditions per place. [2024-06-27 23:00:36,704 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 56 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2024-06-27 23:00:36,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 819 flow [2024-06-27 23:00:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 23:00:36,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:00:36,705 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 633 flow. Second operand 7 states and 104 transitions. [2024-06-27 23:00:36,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 819 flow [2024-06-27 23:00:36,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 774 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:36,713 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 649 flow [2024-06-27 23:00:36,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2024-06-27 23:00:36,713 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-27 23:00:36,714 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 649 flow [2024-06-27 23:00:36,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:36,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:36,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:36,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:00:36,714 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:36,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash -537346301, now seen corresponding path program 3 times [2024-06-27 23:00:36,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:36,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732443450] [2024-06-27 23:00:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:37,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732443450] [2024-06-27 23:00:37,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732443450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:37,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:37,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:37,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412797158] [2024-06-27 23:00:37,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:37,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:37,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:37,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:37,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:37,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:37,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 649 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:37,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:37,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:37,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:37,359 INFO L124 PetriNetUnfolderBase]: 218/421 cut-off events. [2024-06-27 23:00:37,359 INFO L125 PetriNetUnfolderBase]: For 7434/7434 co-relation queries the response was YES. [2024-06-27 23:00:37,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 421 events. 218/421 cut-off events. For 7434/7434 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1733 event pairs, 58 based on Foata normal form. 1/422 useless extension candidates. Maximal degree in co-relation 2276. Up to 308 conditions per place. [2024-06-27 23:00:37,364 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 49 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2024-06-27 23:00:37,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 83 transitions, 911 flow [2024-06-27 23:00:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 23:00:37,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 23:00:37,366 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 649 flow. Second operand 6 states and 97 transitions. [2024-06-27 23:00:37,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 83 transitions, 911 flow [2024-06-27 23:00:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 866 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:37,378 INFO L231 Difference]: Finished difference. Result has 91 places, 76 transitions, 721 flow [2024-06-27 23:00:37,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=721, PETRI_PLACES=91, PETRI_TRANSITIONS=76} [2024-06-27 23:00:37,378 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-27 23:00:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 76 transitions, 721 flow [2024-06-27 23:00:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:37,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:37,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:37,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:00:37,380 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:37,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash 312642177, now seen corresponding path program 2 times [2024-06-27 23:00:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:37,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502799869] [2024-06-27 23:00:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:37,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:37,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502799869] [2024-06-27 23:00:37,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502799869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:37,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:37,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383858411] [2024-06-27 23:00:37,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:37,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:37,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 76 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:37,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:37,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:37,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:37,859 INFO L124 PetriNetUnfolderBase]: 226/434 cut-off events. [2024-06-27 23:00:37,859 INFO L125 PetriNetUnfolderBase]: For 8479/8479 co-relation queries the response was YES. [2024-06-27 23:00:37,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 434 events. 226/434 cut-off events. For 8479/8479 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1790 event pairs, 57 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 2430. Up to 322 conditions per place. [2024-06-27 23:00:37,865 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 55 selfloop transitions, 31 changer transitions 0/91 dead transitions. [2024-06-27 23:00:37,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 1055 flow [2024-06-27 23:00:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 23:00:37,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 23:00:37,868 INFO L175 Difference]: Start difference. First operand has 91 places, 76 transitions, 721 flow. Second operand 7 states and 110 transitions. [2024-06-27 23:00:37,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 1055 flow [2024-06-27 23:00:37,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 993 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:37,886 INFO L231 Difference]: Finished difference. Result has 96 places, 82 transitions, 808 flow [2024-06-27 23:00:37,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=808, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2024-06-27 23:00:37,887 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-27 23:00:37,887 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 808 flow [2024-06-27 23:00:37,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:37,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:37,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:37,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:00:37,888 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:37,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2083869043, now seen corresponding path program 3 times [2024-06-27 23:00:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959762220] [2024-06-27 23:00:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:38,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:38,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959762220] [2024-06-27 23:00:38,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959762220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:38,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:38,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122135750] [2024-06-27 23:00:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:38,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:38,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 23:00:38,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 808 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:38,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:38,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 23:00:38,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:38,682 INFO L124 PetriNetUnfolderBase]: 209/414 cut-off events. [2024-06-27 23:00:38,682 INFO L125 PetriNetUnfolderBase]: For 8394/8394 co-relation queries the response was YES. [2024-06-27 23:00:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 414 events. 209/414 cut-off events. For 8394/8394 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1722 event pairs, 33 based on Foata normal form. 3/417 useless extension candidates. Maximal degree in co-relation 2339. Up to 234 conditions per place. [2024-06-27 23:00:38,686 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 59 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-06-27 23:00:38,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 93 transitions, 1038 flow [2024-06-27 23:00:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 23:00:38,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 23:00:38,687 INFO L175 Difference]: Start difference. First operand has 96 places, 82 transitions, 808 flow. Second operand 6 states and 99 transitions. [2024-06-27 23:00:38,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 93 transitions, 1038 flow [2024-06-27 23:00:38,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 93 transitions, 1014 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:38,698 INFO L231 Difference]: Finished difference. Result has 100 places, 82 transitions, 828 flow [2024-06-27 23:00:38,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=828, PETRI_PLACES=100, PETRI_TRANSITIONS=82} [2024-06-27 23:00:38,699 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-27 23:00:38,699 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 82 transitions, 828 flow [2024-06-27 23:00:38,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:38,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:38,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:38,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:00:38,700 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:38,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -528775173, now seen corresponding path program 3 times [2024-06-27 23:00:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:38,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595143504] [2024-06-27 23:00:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:38,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:38,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595143504] [2024-06-27 23:00:38,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595143504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:38,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:38,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:38,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286719809] [2024-06-27 23:00:38,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:38,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:38,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:38,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:38,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 82 transitions, 828 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:38,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:38,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:38,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:39,107 INFO L124 PetriNetUnfolderBase]: 224/432 cut-off events. [2024-06-27 23:00:39,107 INFO L125 PetriNetUnfolderBase]: For 8504/8504 co-relation queries the response was YES. [2024-06-27 23:00:39,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 432 events. 224/432 cut-off events. For 8504/8504 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1770 event pairs, 53 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 2495. Up to 318 conditions per place. [2024-06-27 23:00:39,111 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 48 selfloop transitions, 39 changer transitions 0/92 dead transitions. [2024-06-27 23:00:39,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 92 transitions, 1086 flow [2024-06-27 23:00:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 23:00:39,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48660714285714285 [2024-06-27 23:00:39,112 INFO L175 Difference]: Start difference. First operand has 100 places, 82 transitions, 828 flow. Second operand 7 states and 109 transitions. [2024-06-27 23:00:39,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 92 transitions, 1086 flow [2024-06-27 23:00:39,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:39,124 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 855 flow [2024-06-27 23:00:39,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2024-06-27 23:00:39,124 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 70 predicate places. [2024-06-27 23:00:39,124 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 855 flow [2024-06-27 23:00:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:39,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:39,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:39,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:00:39,125 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:39,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash -529071843, now seen corresponding path program 4 times [2024-06-27 23:00:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453756184] [2024-06-27 23:00:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:39,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453756184] [2024-06-27 23:00:39,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453756184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:39,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:39,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516399716] [2024-06-27 23:00:39,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:39,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:39,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 855 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:39,540 INFO L124 PetriNetUnfolderBase]: 222/428 cut-off events. [2024-06-27 23:00:39,540 INFO L125 PetriNetUnfolderBase]: For 8568/8568 co-relation queries the response was YES. [2024-06-27 23:00:39,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 428 events. 222/428 cut-off events. For 8568/8568 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1762 event pairs, 55 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 2431. Up to 316 conditions per place. [2024-06-27 23:00:39,544 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 51 selfloop transitions, 36 changer transitions 0/92 dead transitions. [2024-06-27 23:00:39,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 92 transitions, 1095 flow [2024-06-27 23:00:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 23:00:39,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48660714285714285 [2024-06-27 23:00:39,545 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 855 flow. Second operand 7 states and 109 transitions. [2024-06-27 23:00:39,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 92 transitions, 1095 flow [2024-06-27 23:00:39,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 1011 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:39,559 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 848 flow [2024-06-27 23:00:39,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2024-06-27 23:00:39,560 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-27 23:00:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 848 flow [2024-06-27 23:00:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:39,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:39,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:39,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:00:39,561 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:39,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash -529072091, now seen corresponding path program 4 times [2024-06-27 23:00:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:39,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030838465] [2024-06-27 23:00:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:39,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:39,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030838465] [2024-06-27 23:00:39,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030838465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:39,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:39,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:39,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808817528] [2024-06-27 23:00:39,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:39,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:39,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:39,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:39,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:39,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 848 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:39,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:39,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:39,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:40,111 INFO L124 PetriNetUnfolderBase]: 220/425 cut-off events. [2024-06-27 23:00:40,112 INFO L125 PetriNetUnfolderBase]: For 8899/8899 co-relation queries the response was YES. [2024-06-27 23:00:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2449 conditions, 425 events. 220/425 cut-off events. For 8899/8899 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1744 event pairs, 56 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 2401. Up to 313 conditions per place. [2024-06-27 23:00:40,115 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 52 selfloop transitions, 33 changer transitions 0/90 dead transitions. [2024-06-27 23:00:40,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 90 transitions, 1032 flow [2024-06-27 23:00:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 23:00:40,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 23:00:40,116 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 848 flow. Second operand 6 states and 95 transitions. [2024-06-27 23:00:40,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 90 transitions, 1032 flow [2024-06-27 23:00:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 90 transitions, 956 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:40,131 INFO L231 Difference]: Finished difference. Result has 105 places, 84 transitions, 844 flow [2024-06-27 23:00:40,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=844, PETRI_PLACES=105, PETRI_TRANSITIONS=84} [2024-06-27 23:00:40,132 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2024-06-27 23:00:40,132 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 84 transitions, 844 flow [2024-06-27 23:00:40,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:40,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:40,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:40,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:00:40,132 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:40,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash 346011383, now seen corresponding path program 1 times [2024-06-27 23:00:40,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:40,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079721640] [2024-06-27 23:00:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:40,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079721640] [2024-06-27 23:00:41,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079721640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:41,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:41,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:41,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871951655] [2024-06-27 23:00:41,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:41,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:41,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:41,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 84 transitions, 844 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:41,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:41,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:41,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:41,320 INFO L124 PetriNetUnfolderBase]: 227/455 cut-off events. [2024-06-27 23:00:41,320 INFO L125 PetriNetUnfolderBase]: For 10203/10203 co-relation queries the response was YES. [2024-06-27 23:00:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2548 conditions, 455 events. 227/455 cut-off events. For 10203/10203 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2007 event pairs, 26 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 2498. Up to 288 conditions per place. [2024-06-27 23:00:41,325 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 56 selfloop transitions, 31 changer transitions 0/100 dead transitions. [2024-06-27 23:00:41,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 100 transitions, 1076 flow [2024-06-27 23:00:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 23:00:41,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:00:41,330 INFO L175 Difference]: Start difference. First operand has 105 places, 84 transitions, 844 flow. Second operand 7 states and 102 transitions. [2024-06-27 23:00:41,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 100 transitions, 1076 flow [2024-06-27 23:00:41,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 100 transitions, 999 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:41,345 INFO L231 Difference]: Finished difference. Result has 108 places, 89 transitions, 906 flow [2024-06-27 23:00:41,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=906, PETRI_PLACES=108, PETRI_TRANSITIONS=89} [2024-06-27 23:00:41,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-27 23:00:41,346 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 89 transitions, 906 flow [2024-06-27 23:00:41,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:41,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:41,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:00:41,347 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:41,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1794907670, now seen corresponding path program 1 times [2024-06-27 23:00:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:41,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785749590] [2024-06-27 23:00:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:41,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785749590] [2024-06-27 23:00:41,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785749590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:41,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:41,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:00:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477186859] [2024-06-27 23:00:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:41,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:00:41,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:00:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:00:41,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:00:41,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 89 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:41,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:41,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:00:41,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:42,294 INFO L124 PetriNetUnfolderBase]: 260/508 cut-off events. [2024-06-27 23:00:42,295 INFO L125 PetriNetUnfolderBase]: For 10483/10483 co-relation queries the response was YES. [2024-06-27 23:00:42,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2876 conditions, 508 events. 260/508 cut-off events. For 10483/10483 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2291 event pairs, 36 based on Foata normal form. 3/511 useless extension candidates. Maximal degree in co-relation 2822. Up to 339 conditions per place. [2024-06-27 23:00:42,304 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 84 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-27 23:00:42,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 1241 flow [2024-06-27 23:00:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-27 23:00:42,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 23:00:42,305 INFO L175 Difference]: Start difference. First operand has 108 places, 89 transitions, 906 flow. Second operand 10 states and 124 transitions. [2024-06-27 23:00:42,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 1241 flow [2024-06-27 23:00:42,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1190 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:42,324 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 988 flow [2024-06-27 23:00:42,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=988, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2024-06-27 23:00:42,326 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-27 23:00:42,326 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 988 flow [2024-06-27 23:00:42,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:42,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:42,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:42,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:00:42,327 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:42,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:42,327 INFO L85 PathProgramCache]: Analyzing trace with hash 693284559, now seen corresponding path program 1 times [2024-06-27 23:00:42,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:42,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057083485] [2024-06-27 23:00:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:42,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:42,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:42,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057083485] [2024-06-27 23:00:42,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057083485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:42,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:42,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040076026] [2024-06-27 23:00:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:42,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:42,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:42,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 95 transitions, 988 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:42,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:42,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:42,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:42,805 INFO L124 PetriNetUnfolderBase]: 258/506 cut-off events. [2024-06-27 23:00:42,806 INFO L125 PetriNetUnfolderBase]: For 10228/10228 co-relation queries the response was YES. [2024-06-27 23:00:42,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2903 conditions, 506 events. 258/506 cut-off events. For 10228/10228 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2294 event pairs, 80 based on Foata normal form. 1/506 useless extension candidates. Maximal degree in co-relation 2847. Up to 411 conditions per place. [2024-06-27 23:00:42,813 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 72 selfloop transitions, 27 changer transitions 0/104 dead transitions. [2024-06-27 23:00:42,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 104 transitions, 1208 flow [2024-06-27 23:00:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 23:00:42,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2024-06-27 23:00:42,815 INFO L175 Difference]: Start difference. First operand has 116 places, 95 transitions, 988 flow. Second operand 7 states and 107 transitions. [2024-06-27 23:00:42,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 104 transitions, 1208 flow [2024-06-27 23:00:42,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 104 transitions, 1131 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:42,833 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 973 flow [2024-06-27 23:00:42,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=973, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2024-06-27 23:00:42,834 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-27 23:00:42,834 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 973 flow [2024-06-27 23:00:42,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:42,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:42,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:00:42,835 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:42,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 693284342, now seen corresponding path program 2 times [2024-06-27 23:00:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:42,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586427375] [2024-06-27 23:00:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586427375] [2024-06-27 23:00:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586427375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:43,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:43,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:00:43,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095673198] [2024-06-27 23:00:43,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:43,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:00:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:00:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:00:43,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:00:43,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 95 transitions, 973 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:43,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:43,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:00:43,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:43,758 INFO L124 PetriNetUnfolderBase]: 277/546 cut-off events. [2024-06-27 23:00:43,758 INFO L125 PetriNetUnfolderBase]: For 13067/13067 co-relation queries the response was YES. [2024-06-27 23:00:43,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 546 events. 277/546 cut-off events. For 13067/13067 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2541 event pairs, 32 based on Foata normal form. 3/548 useless extension candidates. Maximal degree in co-relation 3072. Up to 272 conditions per place. [2024-06-27 23:00:43,762 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 80 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-06-27 23:00:43,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 1393 flow [2024-06-27 23:00:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-27 23:00:43,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41015625 [2024-06-27 23:00:43,763 INFO L175 Difference]: Start difference. First operand has 116 places, 95 transitions, 973 flow. Second operand 8 states and 105 transitions. [2024-06-27 23:00:43,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 1393 flow [2024-06-27 23:00:43,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 114 transitions, 1292 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:43,785 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 967 flow [2024-06-27 23:00:43,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=967, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2024-06-27 23:00:43,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-27 23:00:43,786 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 967 flow [2024-06-27 23:00:43,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:43,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:43,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:43,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:00:43,787 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:43,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1025746322, now seen corresponding path program 3 times [2024-06-27 23:00:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711336162] [2024-06-27 23:00:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:43,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711336162] [2024-06-27 23:00:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711336162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:44,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:00:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23230667] [2024-06-27 23:00:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:00:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:00:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:00:44,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:44,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:44,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:44,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:44,642 INFO L124 PetriNetUnfolderBase]: 298/589 cut-off events. [2024-06-27 23:00:44,642 INFO L125 PetriNetUnfolderBase]: For 14287/14287 co-relation queries the response was YES. [2024-06-27 23:00:44,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3396 conditions, 589 events. 298/589 cut-off events. For 14287/14287 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2823 event pairs, 28 based on Foata normal form. 3/591 useless extension candidates. Maximal degree in co-relation 3338. Up to 355 conditions per place. [2024-06-27 23:00:44,647 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 83 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-27 23:00:44,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 1275 flow [2024-06-27 23:00:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-27 23:00:44,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359375 [2024-06-27 23:00:44,648 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 967 flow. Second operand 8 states and 111 transitions. [2024-06-27 23:00:44,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 1275 flow [2024-06-27 23:00:44,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 114 transitions, 1221 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:44,671 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 1022 flow [2024-06-27 23:00:44,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=121, PETRI_TRANSITIONS=100} [2024-06-27 23:00:44,672 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-27 23:00:44,672 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 1022 flow [2024-06-27 23:00:44,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:44,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:00:44,673 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash 350405611, now seen corresponding path program 2 times [2024-06-27 23:00:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430720701] [2024-06-27 23:00:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:45,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430720701] [2024-06-27 23:00:45,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430720701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:45,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:00:45,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627218871] [2024-06-27 23:00:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:45,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:00:45,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:45,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:00:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:00:45,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:45,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 100 transitions, 1022 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:45,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:45,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:45,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:45,724 INFO L124 PetriNetUnfolderBase]: 288/586 cut-off events. [2024-06-27 23:00:45,725 INFO L125 PetriNetUnfolderBase]: For 14731/14731 co-relation queries the response was YES. [2024-06-27 23:00:45,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 586 events. 288/586 cut-off events. For 14731/14731 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2918 event pairs, 42 based on Foata normal form. 2/587 useless extension candidates. Maximal degree in co-relation 3345. Up to 389 conditions per place. [2024-06-27 23:00:45,730 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 79 selfloop transitions, 23 changer transitions 0/120 dead transitions. [2024-06-27 23:00:45,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 120 transitions, 1321 flow [2024-06-27 23:00:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-27 23:00:45,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 23:00:45,732 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 1022 flow. Second operand 9 states and 120 transitions. [2024-06-27 23:00:45,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 120 transitions, 1321 flow [2024-06-27 23:00:45,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 120 transitions, 1260 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:45,756 INFO L231 Difference]: Finished difference. Result has 127 places, 105 transitions, 1078 flow [2024-06-27 23:00:45,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1078, PETRI_PLACES=127, PETRI_TRANSITIONS=105} [2024-06-27 23:00:45,757 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2024-06-27 23:00:45,757 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 105 transitions, 1078 flow [2024-06-27 23:00:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:45,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:45,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:00:45,758 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:45,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash 497628327, now seen corresponding path program 2 times [2024-06-27 23:00:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:45,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831594192] [2024-06-27 23:00:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831594192] [2024-06-27 23:00:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831594192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213113494] [2024-06-27 23:00:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:46,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:46,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 105 transitions, 1078 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:46,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:46,326 INFO L124 PetriNetUnfolderBase]: 308/612 cut-off events. [2024-06-27 23:00:46,326 INFO L125 PetriNetUnfolderBase]: For 15402/15402 co-relation queries the response was YES. [2024-06-27 23:00:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 612 events. 308/612 cut-off events. For 15402/15402 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3028 event pairs, 55 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 3543. Up to 505 conditions per place. [2024-06-27 23:00:46,331 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 86 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2024-06-27 23:00:46,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 116 transitions, 1344 flow [2024-06-27 23:00:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 23:00:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2024-06-27 23:00:46,333 INFO L175 Difference]: Start difference. First operand has 127 places, 105 transitions, 1078 flow. Second operand 7 states and 107 transitions. [2024-06-27 23:00:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 116 transitions, 1344 flow [2024-06-27 23:00:46,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 116 transitions, 1295 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:46,360 INFO L231 Difference]: Finished difference. Result has 131 places, 107 transitions, 1112 flow [2024-06-27 23:00:46,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1112, PETRI_PLACES=131, PETRI_TRANSITIONS=107} [2024-06-27 23:00:46,360 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2024-06-27 23:00:46,360 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 107 transitions, 1112 flow [2024-06-27 23:00:46,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:46,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:46,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:00:46,361 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:46,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 497636046, now seen corresponding path program 1 times [2024-06-27 23:00:46,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:46,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964542923] [2024-06-27 23:00:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:46,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:46,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964542923] [2024-06-27 23:00:46,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964542923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:46,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:46,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:00:46,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399561954] [2024-06-27 23:00:46,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:46,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:00:46,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:46,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:00:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:00:46,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:00:46,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 107 transitions, 1112 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:00:46,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,079 INFO L124 PetriNetUnfolderBase]: 322/640 cut-off events. [2024-06-27 23:00:47,079 INFO L125 PetriNetUnfolderBase]: For 18884/18884 co-relation queries the response was YES. [2024-06-27 23:00:47,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3762 conditions, 640 events. 322/640 cut-off events. For 18884/18884 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3230 event pairs, 59 based on Foata normal form. 6/645 useless extension candidates. Maximal degree in co-relation 3695. Up to 522 conditions per place. [2024-06-27 23:00:47,084 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 93 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2024-06-27 23:00:47,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 121 transitions, 1402 flow [2024-06-27 23:00:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-27 23:00:47,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131944444444444 [2024-06-27 23:00:47,086 INFO L175 Difference]: Start difference. First operand has 131 places, 107 transitions, 1112 flow. Second operand 9 states and 119 transitions. [2024-06-27 23:00:47,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 121 transitions, 1402 flow [2024-06-27 23:00:47,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 121 transitions, 1345 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:47,114 INFO L231 Difference]: Finished difference. Result has 135 places, 108 transitions, 1125 flow [2024-06-27 23:00:47,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1125, PETRI_PLACES=135, PETRI_TRANSITIONS=108} [2024-06-27 23:00:47,115 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-06-27 23:00:47,115 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 108 transitions, 1125 flow [2024-06-27 23:00:47,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:00:47,115 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:47,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash 497420720, now seen corresponding path program 4 times [2024-06-27 23:00:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682771212] [2024-06-27 23:00:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:47,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:47,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682771212] [2024-06-27 23:00:47,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682771212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:47,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830969759] [2024-06-27 23:00:47,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:47,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:47,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:47,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:47,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 108 transitions, 1125 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:47,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:47,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,927 INFO L124 PetriNetUnfolderBase]: 324/644 cut-off events. [2024-06-27 23:00:47,927 INFO L125 PetriNetUnfolderBase]: For 18044/18044 co-relation queries the response was YES. [2024-06-27 23:00:47,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3796 conditions, 644 events. 324/644 cut-off events. For 18044/18044 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3245 event pairs, 46 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 3728. Up to 456 conditions per place. [2024-06-27 23:00:47,932 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 94 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-27 23:00:47,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 122 transitions, 1429 flow [2024-06-27 23:00:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 23:00:47,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2024-06-27 23:00:47,933 INFO L175 Difference]: Start difference. First operand has 135 places, 108 transitions, 1125 flow. Second operand 7 states and 107 transitions. [2024-06-27 23:00:47,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 122 transitions, 1429 flow [2024-06-27 23:00:47,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 122 transitions, 1369 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:47,982 INFO L231 Difference]: Finished difference. Result has 135 places, 109 transitions, 1135 flow [2024-06-27 23:00:47,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=135, PETRI_TRANSITIONS=109} [2024-06-27 23:00:47,983 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-06-27 23:00:47,983 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 109 transitions, 1135 flow [2024-06-27 23:00:47,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:00:47,984 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:47,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -690310963, now seen corresponding path program 3 times [2024-06-27 23:00:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665714940] [2024-06-27 23:00:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:48,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:48,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665714940] [2024-06-27 23:00:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665714940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:48,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852275761] [2024-06-27 23:00:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:48,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:48,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:48,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 109 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:48,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:48,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:48,883 INFO L124 PetriNetUnfolderBase]: 307/625 cut-off events. [2024-06-27 23:00:48,884 INFO L125 PetriNetUnfolderBase]: For 19584/19587 co-relation queries the response was YES. [2024-06-27 23:00:48,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 625 events. 307/625 cut-off events. For 19584/19587 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3201 event pairs, 48 based on Foata normal form. 2/622 useless extension candidates. Maximal degree in co-relation 3629. Up to 387 conditions per place. [2024-06-27 23:00:48,889 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 77 selfloop transitions, 24 changer transitions 0/120 dead transitions. [2024-06-27 23:00:48,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 120 transitions, 1371 flow [2024-06-27 23:00:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-27 23:00:48,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:00:48,891 INFO L175 Difference]: Start difference. First operand has 135 places, 109 transitions, 1135 flow. Second operand 7 states and 102 transitions. [2024-06-27 23:00:48,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 120 transitions, 1371 flow [2024-06-27 23:00:48,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 1304 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:48,920 INFO L231 Difference]: Finished difference. Result has 137 places, 109 transitions, 1128 flow [2024-06-27 23:00:48,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=137, PETRI_TRANSITIONS=109} [2024-06-27 23:00:48,921 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-27 23:00:48,921 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 109 transitions, 1128 flow [2024-06-27 23:00:48,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:48,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:48,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:00:48,922 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:48,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1733366526, now seen corresponding path program 1 times [2024-06-27 23:00:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:48,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929162619] [2024-06-27 23:00:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929162619] [2024-06-27 23:00:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929162619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:49,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144260981] [2024-06-27 23:00:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:49,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:00:49,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 109 transitions, 1128 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:00:49,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:49,887 INFO L124 PetriNetUnfolderBase]: 363/710 cut-off events. [2024-06-27 23:00:49,887 INFO L125 PetriNetUnfolderBase]: For 19967/19967 co-relation queries the response was YES. [2024-06-27 23:00:49,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 710 events. 363/710 cut-off events. For 19967/19967 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3632 event pairs, 29 based on Foata normal form. 1/711 useless extension candidates. Maximal degree in co-relation 4109. Up to 468 conditions per place. [2024-06-27 23:00:49,893 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 86 selfloop transitions, 49 changer transitions 0/139 dead transitions. [2024-06-27 23:00:49,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 139 transitions, 1721 flow [2024-06-27 23:00:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-27 23:00:49,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44140625 [2024-06-27 23:00:49,897 INFO L175 Difference]: Start difference. First operand has 137 places, 109 transitions, 1128 flow. Second operand 8 states and 113 transitions. [2024-06-27 23:00:49,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 139 transitions, 1721 flow [2024-06-27 23:00:49,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 139 transitions, 1624 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:49,930 INFO L231 Difference]: Finished difference. Result has 140 places, 123 transitions, 1324 flow [2024-06-27 23:00:49,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=140, PETRI_TRANSITIONS=123} [2024-06-27 23:00:49,931 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 109 predicate places. [2024-06-27 23:00:49,931 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 123 transitions, 1324 flow [2024-06-27 23:00:49,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:49,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:00:49,931 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:49,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1109124103, now seen corresponding path program 3 times [2024-06-27 23:00:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166975414] [2024-06-27 23:00:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166975414] [2024-06-27 23:00:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166975414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174873509] [2024-06-27 23:00:50,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:50,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:50,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 123 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:50,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,542 INFO L124 PetriNetUnfolderBase]: 371/720 cut-off events. [2024-06-27 23:00:50,542 INFO L125 PetriNetUnfolderBase]: For 19801/19801 co-relation queries the response was YES. [2024-06-27 23:00:50,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4401 conditions, 720 events. 371/720 cut-off events. For 19801/19801 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3667 event pairs, 68 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 4330. Up to 543 conditions per place. [2024-06-27 23:00:50,548 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 85 selfloop transitions, 48 changer transitions 0/138 dead transitions. [2024-06-27 23:00:50,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 138 transitions, 1836 flow [2024-06-27 23:00:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 23:00:50,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:00:50,549 INFO L175 Difference]: Start difference. First operand has 140 places, 123 transitions, 1324 flow. Second operand 7 states and 112 transitions. [2024-06-27 23:00:50,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 138 transitions, 1836 flow [2024-06-27 23:00:50,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 138 transitions, 1755 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:50,583 INFO L231 Difference]: Finished difference. Result has 145 places, 129 transitions, 1444 flow [2024-06-27 23:00:50,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1444, PETRI_PLACES=145, PETRI_TRANSITIONS=129} [2024-06-27 23:00:50,583 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 114 predicate places. [2024-06-27 23:00:50,583 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 129 transitions, 1444 flow [2024-06-27 23:00:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:00:50,584 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash 432148314, now seen corresponding path program 2 times [2024-06-27 23:00:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059287972] [2024-06-27 23:00:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:50,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059287972] [2024-06-27 23:00:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059287972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965222929] [2024-06-27 23:00:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:50,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:50,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 129 transitions, 1444 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:50,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,223 INFO L124 PetriNetUnfolderBase]: 385/746 cut-off events. [2024-06-27 23:00:51,223 INFO L125 PetriNetUnfolderBase]: For 22442/22442 co-relation queries the response was YES. [2024-06-27 23:00:51,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 746 events. 385/746 cut-off events. For 22442/22442 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3860 event pairs, 76 based on Foata normal form. 6/751 useless extension candidates. Maximal degree in co-relation 4454. Up to 586 conditions per place. [2024-06-27 23:00:51,228 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 94 selfloop transitions, 42 changer transitions 0/141 dead transitions. [2024-06-27 23:00:51,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 141 transitions, 1770 flow [2024-06-27 23:00:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 23:00:51,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 23:00:51,232 INFO L175 Difference]: Start difference. First operand has 145 places, 129 transitions, 1444 flow. Second operand 8 states and 122 transitions. [2024-06-27 23:00:51,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 141 transitions, 1770 flow [2024-06-27 23:00:51,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 141 transitions, 1709 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:51,267 INFO L231 Difference]: Finished difference. Result has 150 places, 130 transitions, 1493 flow [2024-06-27 23:00:51,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=150, PETRI_TRANSITIONS=130} [2024-06-27 23:00:51,268 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 119 predicate places. [2024-06-27 23:00:51,268 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 130 transitions, 1493 flow [2024-06-27 23:00:51,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:00:51,269 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:51,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash 521927862, now seen corresponding path program 5 times [2024-06-27 23:00:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23818862] [2024-06-27 23:00:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:51,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23818862] [2024-06-27 23:00:51,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23818862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297610441] [2024-06-27 23:00:51,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:51,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:51,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 130 transitions, 1493 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,018 INFO L124 PetriNetUnfolderBase]: 392/762 cut-off events. [2024-06-27 23:00:52,019 INFO L125 PetriNetUnfolderBase]: For 21001/21001 co-relation queries the response was YES. [2024-06-27 23:00:52,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4652 conditions, 762 events. 392/762 cut-off events. For 21001/21001 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3959 event pairs, 62 based on Foata normal form. 3/764 useless extension candidates. Maximal degree in co-relation 4579. Up to 357 conditions per place. [2024-06-27 23:00:52,023 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 107 selfloop transitions, 34 changer transitions 0/146 dead transitions. [2024-06-27 23:00:52,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 146 transitions, 1982 flow [2024-06-27 23:00:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 23:00:52,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 23:00:52,025 INFO L175 Difference]: Start difference. First operand has 150 places, 130 transitions, 1493 flow. Second operand 7 states and 110 transitions. [2024-06-27 23:00:52,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 146 transitions, 1982 flow [2024-06-27 23:00:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 146 transitions, 1884 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:52,063 INFO L231 Difference]: Finished difference. Result has 151 places, 131 transitions, 1483 flow [2024-06-27 23:00:52,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1483, PETRI_PLACES=151, PETRI_TRANSITIONS=131} [2024-06-27 23:00:52,065 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 120 predicate places. [2024-06-27 23:00:52,065 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 131 transitions, 1483 flow [2024-06-27 23:00:52,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:00:52,066 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:52,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash 778635762, now seen corresponding path program 6 times [2024-06-27 23:00:52,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298360594] [2024-06-27 23:00:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298360594] [2024-06-27 23:00:52,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298360594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:52,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232136161] [2024-06-27 23:00:52,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:52,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:52,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:52,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:52,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 131 transitions, 1483 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:52,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,861 INFO L124 PetriNetUnfolderBase]: 399/777 cut-off events. [2024-06-27 23:00:52,861 INFO L125 PetriNetUnfolderBase]: For 22399/22399 co-relation queries the response was YES. [2024-06-27 23:00:52,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4760 conditions, 777 events. 399/777 cut-off events. For 22399/22399 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4064 event pairs, 49 based on Foata normal form. 3/779 useless extension candidates. Maximal degree in co-relation 4686. Up to 363 conditions per place. [2024-06-27 23:00:52,866 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 94 selfloop transitions, 48 changer transitions 0/147 dead transitions. [2024-06-27 23:00:52,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 1917 flow [2024-06-27 23:00:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 23:00:52,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48660714285714285 [2024-06-27 23:00:52,871 INFO L175 Difference]: Start difference. First operand has 151 places, 131 transitions, 1483 flow. Second operand 7 states and 109 transitions. [2024-06-27 23:00:52,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 1917 flow [2024-06-27 23:00:52,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 147 transitions, 1819 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:52,912 INFO L231 Difference]: Finished difference. Result has 153 places, 132 transitions, 1503 flow [2024-06-27 23:00:52,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1503, PETRI_PLACES=153, PETRI_TRANSITIONS=132} [2024-06-27 23:00:52,914 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 122 predicate places. [2024-06-27 23:00:52,914 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 132 transitions, 1503 flow [2024-06-27 23:00:52,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:00:52,919 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:52,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 787840468, now seen corresponding path program 3 times [2024-06-27 23:00:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99691824] [2024-06-27 23:00:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99691824] [2024-06-27 23:00:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99691824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408665941] [2024-06-27 23:00:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:53,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:53,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 132 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:53,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,528 INFO L124 PetriNetUnfolderBase]: 413/804 cut-off events. [2024-06-27 23:00:53,528 INFO L125 PetriNetUnfolderBase]: For 25260/25260 co-relation queries the response was YES. [2024-06-27 23:00:53,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 804 events. 413/804 cut-off events. For 25260/25260 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4254 event pairs, 80 based on Foata normal form. 6/809 useless extension candidates. Maximal degree in co-relation 4781. Up to 638 conditions per place. [2024-06-27 23:00:53,534 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 94 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-06-27 23:00:53,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 144 transitions, 1835 flow [2024-06-27 23:00:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 23:00:53,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 23:00:53,535 INFO L175 Difference]: Start difference. First operand has 153 places, 132 transitions, 1503 flow. Second operand 8 states and 122 transitions. [2024-06-27 23:00:53,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 144 transitions, 1835 flow [2024-06-27 23:00:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 144 transitions, 1733 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:53,580 INFO L231 Difference]: Finished difference. Result has 156 places, 133 transitions, 1517 flow [2024-06-27 23:00:53,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1517, PETRI_PLACES=156, PETRI_TRANSITIONS=133} [2024-06-27 23:00:53,581 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 125 predicate places. [2024-06-27 23:00:53,581 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 133 transitions, 1517 flow [2024-06-27 23:00:53,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:00:53,582 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:53,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash 521933442, now seen corresponding path program 7 times [2024-06-27 23:00:53,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174873440] [2024-06-27 23:00:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174873440] [2024-06-27 23:00:54,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174873440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335318394] [2024-06-27 23:00:54,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:54,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:54,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:54,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 133 transitions, 1517 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:54,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,478 INFO L124 PetriNetUnfolderBase]: 408/797 cut-off events. [2024-06-27 23:00:54,479 INFO L125 PetriNetUnfolderBase]: For 22425/22425 co-relation queries the response was YES. [2024-06-27 23:00:54,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 797 events. 408/797 cut-off events. For 22425/22425 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4214 event pairs, 64 based on Foata normal form. 3/799 useless extension candidates. Maximal degree in co-relation 4586. Up to 386 conditions per place. [2024-06-27 23:00:54,485 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 109 selfloop transitions, 35 changer transitions 0/149 dead transitions. [2024-06-27 23:00:54,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 149 transitions, 1942 flow [2024-06-27 23:00:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 23:00:54,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:00:54,486 INFO L175 Difference]: Start difference. First operand has 156 places, 133 transitions, 1517 flow. Second operand 7 states and 112 transitions. [2024-06-27 23:00:54,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 149 transitions, 1942 flow [2024-06-27 23:00:54,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 1830 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:54,537 INFO L231 Difference]: Finished difference. Result has 157 places, 133 transitions, 1479 flow [2024-06-27 23:00:54,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1479, PETRI_PLACES=157, PETRI_TRANSITIONS=133} [2024-06-27 23:00:54,537 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-27 23:00:54,538 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 133 transitions, 1479 flow [2024-06-27 23:00:54,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:00:54,538 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:54,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 788166898, now seen corresponding path program 4 times [2024-06-27 23:00:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554693060] [2024-06-27 23:00:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554693060] [2024-06-27 23:00:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554693060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78782847] [2024-06-27 23:00:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:55,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:55,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 133 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:55,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,219 INFO L124 PetriNetUnfolderBase]: 434/848 cut-off events. [2024-06-27 23:00:55,219 INFO L125 PetriNetUnfolderBase]: For 27651/27651 co-relation queries the response was YES. [2024-06-27 23:00:55,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5093 conditions, 848 events. 434/848 cut-off events. For 27651/27651 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4606 event pairs, 156 based on Foata normal form. 3/850 useless extension candidates. Maximal degree in co-relation 5017. Up to 722 conditions per place. [2024-06-27 23:00:55,226 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 130 selfloop transitions, 14 changer transitions 0/149 dead transitions. [2024-06-27 23:00:55,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 149 transitions, 1917 flow [2024-06-27 23:00:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-27 23:00:55,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 23:00:55,231 INFO L175 Difference]: Start difference. First operand has 157 places, 133 transitions, 1479 flow. Second operand 8 states and 116 transitions. [2024-06-27 23:00:55,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 149 transitions, 1917 flow [2024-06-27 23:00:55,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 1810 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:55,296 INFO L231 Difference]: Finished difference. Result has 159 places, 136 transitions, 1452 flow [2024-06-27 23:00:55,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1452, PETRI_PLACES=159, PETRI_TRANSITIONS=136} [2024-06-27 23:00:55,299 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 128 predicate places. [2024-06-27 23:00:55,299 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 136 transitions, 1452 flow [2024-06-27 23:00:55,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:00:55,300 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:55,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 787840189, now seen corresponding path program 4 times [2024-06-27 23:00:55,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292949139] [2024-06-27 23:00:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:55,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292949139] [2024-06-27 23:00:55,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292949139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:55,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:55,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627744781] [2024-06-27 23:00:55,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:55,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:55,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 136 transitions, 1452 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:55,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,012 INFO L124 PetriNetUnfolderBase]: 432/844 cut-off events. [2024-06-27 23:00:56,012 INFO L125 PetriNetUnfolderBase]: For 26069/26069 co-relation queries the response was YES. [2024-06-27 23:00:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5013 conditions, 844 events. 432/844 cut-off events. For 26069/26069 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4555 event pairs, 87 based on Foata normal form. 1/844 useless extension candidates. Maximal degree in co-relation 4935. Up to 658 conditions per place. [2024-06-27 23:00:56,035 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 86 selfloop transitions, 53 changer transitions 0/144 dead transitions. [2024-06-27 23:00:56,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 144 transitions, 1826 flow [2024-06-27 23:00:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 23:00:56,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 23:00:56,036 INFO L175 Difference]: Start difference. First operand has 159 places, 136 transitions, 1452 flow. Second operand 7 states and 110 transitions. [2024-06-27 23:00:56,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 144 transitions, 1826 flow [2024-06-27 23:00:56,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 144 transitions, 1774 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:56,154 INFO L231 Difference]: Finished difference. Result has 161 places, 136 transitions, 1512 flow [2024-06-27 23:00:56,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1512, PETRI_PLACES=161, PETRI_TRANSITIONS=136} [2024-06-27 23:00:56,155 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2024-06-27 23:00:56,155 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 136 transitions, 1512 flow [2024-06-27 23:00:56,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:56,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:56,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:00:56,155 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:56,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 521933659, now seen corresponding path program 5 times [2024-06-27 23:00:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639627063] [2024-06-27 23:00:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:56,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639627063] [2024-06-27 23:00:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639627063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546583548] [2024-06-27 23:00:56,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:56,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:56,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 136 transitions, 1512 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:56,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,896 INFO L124 PetriNetUnfolderBase]: 430/841 cut-off events. [2024-06-27 23:00:56,896 INFO L125 PetriNetUnfolderBase]: For 26488/26488 co-relation queries the response was YES. [2024-06-27 23:00:56,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 841 events. 430/841 cut-off events. For 26488/26488 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4540 event pairs, 87 based on Foata normal form. 1/841 useless extension candidates. Maximal degree in co-relation 4927. Up to 656 conditions per place. [2024-06-27 23:00:56,902 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 94 selfloop transitions, 44 changer transitions 0/143 dead transitions. [2024-06-27 23:00:56,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 143 transitions, 1804 flow [2024-06-27 23:00:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 23:00:56,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955357142857143 [2024-06-27 23:00:56,925 INFO L175 Difference]: Start difference. First operand has 161 places, 136 transitions, 1512 flow. Second operand 7 states and 111 transitions. [2024-06-27 23:00:56,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 143 transitions, 1804 flow [2024-06-27 23:00:56,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 143 transitions, 1698 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:56,983 INFO L231 Difference]: Finished difference. Result has 162 places, 136 transitions, 1501 flow [2024-06-27 23:00:56,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1501, PETRI_PLACES=162, PETRI_TRANSITIONS=136} [2024-06-27 23:00:56,984 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2024-06-27 23:00:56,984 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 136 transitions, 1501 flow [2024-06-27 23:00:56,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:56,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:56,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:00:56,985 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:56,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 522143188, now seen corresponding path program 5 times [2024-06-27 23:00:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:56,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534412307] [2024-06-27 23:00:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:57,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:57,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534412307] [2024-06-27 23:00:57,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534412307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:57,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:57,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821623058] [2024-06-27 23:00:57,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:57,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:57,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:57,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:57,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:00:57,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 136 transitions, 1501 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:57,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:00:57,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:57,630 INFO L124 PetriNetUnfolderBase]: 432/848 cut-off events. [2024-06-27 23:00:57,630 INFO L125 PetriNetUnfolderBase]: For 28296/28296 co-relation queries the response was YES. [2024-06-27 23:00:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 848 events. 432/848 cut-off events. For 28296/28296 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4593 event pairs, 89 based on Foata normal form. 6/853 useless extension candidates. Maximal degree in co-relation 4852. Up to 676 conditions per place. [2024-06-27 23:00:57,650 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 104 selfloop transitions, 39 changer transitions 0/148 dead transitions. [2024-06-27 23:00:57,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 148 transitions, 1849 flow [2024-06-27 23:00:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 23:00:57,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 23:00:57,657 INFO L175 Difference]: Start difference. First operand has 162 places, 136 transitions, 1501 flow. Second operand 8 states and 122 transitions. [2024-06-27 23:00:57,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 148 transitions, 1849 flow [2024-06-27 23:00:57,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 148 transitions, 1704 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:57,716 INFO L231 Difference]: Finished difference. Result has 162 places, 137 transitions, 1464 flow [2024-06-27 23:00:57,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1464, PETRI_PLACES=162, PETRI_TRANSITIONS=137} [2024-06-27 23:00:57,717 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2024-06-27 23:00:57,717 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 137 transitions, 1464 flow [2024-06-27 23:00:57,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:57,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:57,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:57,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:00:57,718 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:57,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2136419866, now seen corresponding path program 1 times [2024-06-27 23:00:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884421145] [2024-06-27 23:00:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:57,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884421145] [2024-06-27 23:00:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884421145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:58,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156052512] [2024-06-27 23:00:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:58,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:00:58,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 137 transitions, 1464 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:58,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:00:58,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:58,486 INFO L124 PetriNetUnfolderBase]: 436/855 cut-off events. [2024-06-27 23:00:58,487 INFO L125 PetriNetUnfolderBase]: For 25280/25280 co-relation queries the response was YES. [2024-06-27 23:00:58,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4946 conditions, 855 events. 436/855 cut-off events. For 25280/25280 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4659 event pairs, 55 based on Foata normal form. 2/857 useless extension candidates. Maximal degree in co-relation 4866. Up to 621 conditions per place. [2024-06-27 23:00:58,492 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 97 selfloop transitions, 53 changer transitions 0/154 dead transitions. [2024-06-27 23:00:58,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 154 transitions, 1827 flow [2024-06-27 23:00:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 23:00:58,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201388888888889 [2024-06-27 23:00:58,494 INFO L175 Difference]: Start difference. First operand has 162 places, 137 transitions, 1464 flow. Second operand 9 states and 121 transitions. [2024-06-27 23:00:58,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 154 transitions, 1827 flow [2024-06-27 23:00:58,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 154 transitions, 1729 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:58,549 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1543 flow [2024-06-27 23:00:58,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1543, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-27 23:00:58,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-27 23:00:58,549 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1543 flow [2024-06-27 23:00:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:58,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:58,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:00:58,550 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:58,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 745130980, now seen corresponding path program 2 times [2024-06-27 23:00:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:58,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751432035] [2024-06-27 23:00:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:58,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:58,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:58,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751432035] [2024-06-27 23:00:58,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751432035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:58,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:58,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:00:58,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615908264] [2024-06-27 23:00:58,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:58,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:00:58,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:00:58,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:00:58,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:00:58,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1543 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:58,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:58,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:00:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:59,183 INFO L124 PetriNetUnfolderBase]: 438/860 cut-off events. [2024-06-27 23:00:59,184 INFO L125 PetriNetUnfolderBase]: For 26987/26987 co-relation queries the response was YES. [2024-06-27 23:00:59,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 860 events. 438/860 cut-off events. For 26987/26987 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4723 event pairs, 68 based on Foata normal form. 6/865 useless extension candidates. Maximal degree in co-relation 4833. Up to 637 conditions per place. [2024-06-27 23:00:59,189 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 120 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-27 23:00:59,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 156 transitions, 1901 flow [2024-06-27 23:00:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-27 23:00:59,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-27 23:00:59,190 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1543 flow. Second operand 9 states and 111 transitions. [2024-06-27 23:00:59,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 156 transitions, 1901 flow [2024-06-27 23:00:59,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 156 transitions, 1786 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:59,243 INFO L231 Difference]: Finished difference. Result has 168 places, 142 transitions, 1526 flow [2024-06-27 23:00:59,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1526, PETRI_PLACES=168, PETRI_TRANSITIONS=142} [2024-06-27 23:00:59,244 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 137 predicate places. [2024-06-27 23:00:59,244 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 142 transitions, 1526 flow [2024-06-27 23:00:59,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:59,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:00:59,245 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:59,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash 16979738, now seen corresponding path program 3 times [2024-06-27 23:00:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:59,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311905075] [2024-06-27 23:00:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:59,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311905075] [2024-06-27 23:00:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311905075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:59,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:59,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:00:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086054969] [2024-06-27 23:00:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:00:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:00:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:00:59,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:00:59,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 142 transitions, 1526 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:59,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:59,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:00:59,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:00,274 INFO L124 PetriNetUnfolderBase]: 472/930 cut-off events. [2024-06-27 23:01:00,275 INFO L125 PetriNetUnfolderBase]: For 31903/31903 co-relation queries the response was YES. [2024-06-27 23:01:00,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5543 conditions, 930 events. 472/930 cut-off events. For 31903/31903 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5218 event pairs, 53 based on Foata normal form. 4/933 useless extension candidates. Maximal degree in co-relation 5460. Up to 441 conditions per place. [2024-06-27 23:01:00,281 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 116 selfloop transitions, 47 changer transitions 0/167 dead transitions. [2024-06-27 23:01:00,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 167 transitions, 2169 flow [2024-06-27 23:01:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-27 23:01:00,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2024-06-27 23:01:00,282 INFO L175 Difference]: Start difference. First operand has 168 places, 142 transitions, 1526 flow. Second operand 9 states and 118 transitions. [2024-06-27 23:01:00,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 167 transitions, 2169 flow [2024-06-27 23:01:00,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 167 transitions, 2085 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:00,347 INFO L231 Difference]: Finished difference. Result has 170 places, 146 transitions, 1603 flow [2024-06-27 23:01:00,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=170, PETRI_TRANSITIONS=146} [2024-06-27 23:01:00,348 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 139 predicate places. [2024-06-27 23:01:00,348 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 146 transitions, 1603 flow [2024-06-27 23:01:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:00,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:00,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:00,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:01:00,349 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:00,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 16986248, now seen corresponding path program 4 times [2024-06-27 23:01:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:00,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333749793] [2024-06-27 23:01:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:00,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:00,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333749793] [2024-06-27 23:01:00,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333749793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:00,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:00,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:00,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171700302] [2024-06-27 23:01:00,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:00,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:00,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:00,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:00,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 146 transitions, 1603 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:00,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:00,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:00,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:01,291 INFO L124 PetriNetUnfolderBase]: 465/917 cut-off events. [2024-06-27 23:01:01,291 INFO L125 PetriNetUnfolderBase]: For 30310/30310 co-relation queries the response was YES. [2024-06-27 23:01:01,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5368 conditions, 917 events. 465/917 cut-off events. For 30310/30310 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5136 event pairs, 51 based on Foata normal form. 4/920 useless extension candidates. Maximal degree in co-relation 5284. Up to 437 conditions per place. [2024-06-27 23:01:01,298 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 109 selfloop transitions, 55 changer transitions 0/168 dead transitions. [2024-06-27 23:01:01,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 168 transitions, 2202 flow [2024-06-27 23:01:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-27 23:01:01,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2024-06-27 23:01:01,299 INFO L175 Difference]: Start difference. First operand has 170 places, 146 transitions, 1603 flow. Second operand 9 states and 118 transitions. [2024-06-27 23:01:01,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 168 transitions, 2202 flow [2024-06-27 23:01:01,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 168 transitions, 2121 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:01,397 INFO L231 Difference]: Finished difference. Result has 175 places, 146 transitions, 1645 flow [2024-06-27 23:01:01,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1645, PETRI_PLACES=175, PETRI_TRANSITIONS=146} [2024-06-27 23:01:01,398 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 144 predicate places. [2024-06-27 23:01:01,398 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 146 transitions, 1645 flow [2024-06-27 23:01:01,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:01,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:01,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:01:01,399 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:01,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash -968205028, now seen corresponding path program 1 times [2024-06-27 23:01:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:01,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800900016] [2024-06-27 23:01:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800900016] [2024-06-27 23:01:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800900016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:01,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564554009] [2024-06-27 23:01:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:01,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:01,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 146 transitions, 1645 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:01,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:01,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:02,245 INFO L124 PetriNetUnfolderBase]: 472/932 cut-off events. [2024-06-27 23:01:02,245 INFO L125 PetriNetUnfolderBase]: For 30963/30963 co-relation queries the response was YES. [2024-06-27 23:01:02,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5584 conditions, 932 events. 472/932 cut-off events. For 30963/30963 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5281 event pairs, 115 based on Foata normal form. 3/934 useless extension candidates. Maximal degree in co-relation 5498. Up to 767 conditions per place. [2024-06-27 23:01:02,252 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 122 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-27 23:01:02,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 160 transitions, 2027 flow [2024-06-27 23:01:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-27 23:01:02,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-27 23:01:02,254 INFO L175 Difference]: Start difference. First operand has 175 places, 146 transitions, 1645 flow. Second operand 9 states and 122 transitions. [2024-06-27 23:01:02,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 160 transitions, 2027 flow [2024-06-27 23:01:02,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 160 transitions, 1938 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:02,323 INFO L231 Difference]: Finished difference. Result has 177 places, 147 transitions, 1659 flow [2024-06-27 23:01:02,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1659, PETRI_PLACES=177, PETRI_TRANSITIONS=147} [2024-06-27 23:01:02,324 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 146 predicate places. [2024-06-27 23:01:02,324 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 147 transitions, 1659 flow [2024-06-27 23:01:02,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:02,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:02,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:02,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:01:02,325 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:02,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 436745204, now seen corresponding path program 2 times [2024-06-27 23:01:02,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:02,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755388385] [2024-06-27 23:01:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:03,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755388385] [2024-06-27 23:01:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755388385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:03,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:03,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:03,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615850335] [2024-06-27 23:01:03,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:03,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:03,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 147 transitions, 1659 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:03,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:03,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:03,308 INFO L124 PetriNetUnfolderBase]: 469/927 cut-off events. [2024-06-27 23:01:03,308 INFO L125 PetriNetUnfolderBase]: For 29164/29164 co-relation queries the response was YES. [2024-06-27 23:01:03,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 927 events. 469/927 cut-off events. For 29164/29164 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5222 event pairs, 70 based on Foata normal form. 2/928 useless extension candidates. Maximal degree in co-relation 5358. Up to 674 conditions per place. [2024-06-27 23:01:03,315 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 127 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-06-27 23:01:03,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 159 transitions, 1997 flow [2024-06-27 23:01:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-27 23:01:03,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 23:01:03,317 INFO L175 Difference]: Start difference. First operand has 177 places, 147 transitions, 1659 flow. Second operand 8 states and 108 transitions. [2024-06-27 23:01:03,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 159 transitions, 1997 flow [2024-06-27 23:01:03,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 159 transitions, 1910 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:03,386 INFO L231 Difference]: Finished difference. Result has 178 places, 147 transitions, 1640 flow [2024-06-27 23:01:03,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1640, PETRI_PLACES=178, PETRI_TRANSITIONS=147} [2024-06-27 23:01:03,387 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 147 predicate places. [2024-06-27 23:01:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 147 transitions, 1640 flow [2024-06-27 23:01:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:03,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:03,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:01:03,388 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:03,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2026370968, now seen corresponding path program 5 times [2024-06-27 23:01:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146046079] [2024-06-27 23:01:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:03,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:03,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:03,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146046079] [2024-06-27 23:01:03,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146046079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:03,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:03,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339120238] [2024-06-27 23:01:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:03,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:03,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:03,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:03,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 147 transitions, 1640 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:03,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:03,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:04,482 INFO L124 PetriNetUnfolderBase]: 554/1093 cut-off events. [2024-06-27 23:01:04,483 INFO L125 PetriNetUnfolderBase]: For 32931/32931 co-relation queries the response was YES. [2024-06-27 23:01:04,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 1093 events. 554/1093 cut-off events. For 32931/32931 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6533 event pairs, 78 based on Foata normal form. 3/1095 useless extension candidates. Maximal degree in co-relation 6278. Up to 715 conditions per place. [2024-06-27 23:01:04,490 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 148 selfloop transitions, 37 changer transitions 0/189 dead transitions. [2024-06-27 23:01:04,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 189 transitions, 2424 flow [2024-06-27 23:01:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-27 23:01:04,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-27 23:01:04,492 INFO L175 Difference]: Start difference. First operand has 178 places, 147 transitions, 1640 flow. Second operand 11 states and 141 transitions. [2024-06-27 23:01:04,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 189 transitions, 2424 flow [2024-06-27 23:01:04,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 189 transitions, 2310 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:04,576 INFO L231 Difference]: Finished difference. Result has 185 places, 159 transitions, 1831 flow [2024-06-27 23:01:04,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1831, PETRI_PLACES=185, PETRI_TRANSITIONS=159} [2024-06-27 23:01:04,577 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2024-06-27 23:01:04,577 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 159 transitions, 1831 flow [2024-06-27 23:01:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:04,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:04,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:04,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:01:04,578 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:04,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:04,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1753158760, now seen corresponding path program 2 times [2024-06-27 23:01:04,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:04,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98564331] [2024-06-27 23:01:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:04,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:05,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:05,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98564331] [2024-06-27 23:01:05,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98564331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:05,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:05,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274297842] [2024-06-27 23:01:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:05,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:05,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:05,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 159 transitions, 1831 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:05,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:05,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:05,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:05,465 INFO L124 PetriNetUnfolderBase]: 561/1112 cut-off events. [2024-06-27 23:01:05,466 INFO L125 PetriNetUnfolderBase]: For 35820/35820 co-relation queries the response was YES. [2024-06-27 23:01:05,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6550 conditions, 1112 events. 561/1112 cut-off events. For 35820/35820 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6667 event pairs, 108 based on Foata normal form. 3/1114 useless extension candidates. Maximal degree in co-relation 6458. Up to 943 conditions per place. [2024-06-27 23:01:05,475 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 141 selfloop transitions, 28 changer transitions 0/173 dead transitions. [2024-06-27 23:01:05,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 173 transitions, 2241 flow [2024-06-27 23:01:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-27 23:01:05,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-27 23:01:05,476 INFO L175 Difference]: Start difference. First operand has 185 places, 159 transitions, 1831 flow. Second operand 9 states and 122 transitions. [2024-06-27 23:01:05,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 173 transitions, 2241 flow [2024-06-27 23:01:05,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 173 transitions, 2161 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:05,576 INFO L231 Difference]: Finished difference. Result has 189 places, 160 transitions, 1845 flow [2024-06-27 23:01:05,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1845, PETRI_PLACES=189, PETRI_TRANSITIONS=160} [2024-06-27 23:01:05,577 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-06-27 23:01:05,577 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 160 transitions, 1845 flow [2024-06-27 23:01:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:05,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:05,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:01:05,578 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:05,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash 190494218, now seen corresponding path program 6 times [2024-06-27 23:01:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560553216] [2024-06-27 23:01:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:06,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:06,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560553216] [2024-06-27 23:01:06,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560553216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:06,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:06,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075507819] [2024-06-27 23:01:06,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:06,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:06,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:06,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 160 transitions, 1845 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:06,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:06,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:06,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:06,658 INFO L124 PetriNetUnfolderBase]: 580/1146 cut-off events. [2024-06-27 23:01:06,659 INFO L125 PetriNetUnfolderBase]: For 33530/33530 co-relation queries the response was YES. [2024-06-27 23:01:06,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6597 conditions, 1146 events. 580/1146 cut-off events. For 33530/33530 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6957 event pairs, 79 based on Foata normal form. 1/1147 useless extension candidates. Maximal degree in co-relation 6504. Up to 839 conditions per place. [2024-06-27 23:01:06,668 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 135 selfloop transitions, 51 changer transitions 0/190 dead transitions. [2024-06-27 23:01:06,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 190 transitions, 2449 flow [2024-06-27 23:01:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 23:01:06,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-27 23:01:06,669 INFO L175 Difference]: Start difference. First operand has 189 places, 160 transitions, 1845 flow. Second operand 11 states and 135 transitions. [2024-06-27 23:01:06,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 190 transitions, 2449 flow [2024-06-27 23:01:06,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 190 transitions, 2377 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:06,827 INFO L231 Difference]: Finished difference. Result has 196 places, 174 transitions, 2115 flow [2024-06-27 23:01:06,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2115, PETRI_PLACES=196, PETRI_TRANSITIONS=174} [2024-06-27 23:01:06,827 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2024-06-27 23:01:06,828 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 174 transitions, 2115 flow [2024-06-27 23:01:06,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:06,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:06,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:06,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:01:06,828 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:06,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1149876986, now seen corresponding path program 3 times [2024-06-27 23:01:06,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:06,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694197189] [2024-06-27 23:01:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:06,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:07,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694197189] [2024-06-27 23:01:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694197189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:07,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836739064] [2024-06-27 23:01:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:07,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:07,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 174 transitions, 2115 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:07,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:07,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:07,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:08,011 INFO L124 PetriNetUnfolderBase]: 587/1162 cut-off events. [2024-06-27 23:01:08,011 INFO L125 PetriNetUnfolderBase]: For 38089/38089 co-relation queries the response was YES. [2024-06-27 23:01:08,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1162 events. 587/1162 cut-off events. For 38089/38089 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7094 event pairs, 111 based on Foata normal form. 3/1164 useless extension candidates. Maximal degree in co-relation 6830. Up to 927 conditions per place. [2024-06-27 23:01:08,021 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 131 selfloop transitions, 51 changer transitions 0/186 dead transitions. [2024-06-27 23:01:08,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 186 transitions, 2543 flow [2024-06-27 23:01:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-27 23:01:08,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:01:08,023 INFO L175 Difference]: Start difference. First operand has 196 places, 174 transitions, 2115 flow. Second operand 9 states and 126 transitions. [2024-06-27 23:01:08,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 186 transitions, 2543 flow [2024-06-27 23:01:08,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 186 transitions, 2470 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:08,148 INFO L231 Difference]: Finished difference. Result has 203 places, 176 transitions, 2194 flow [2024-06-27 23:01:08,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2194, PETRI_PLACES=203, PETRI_TRANSITIONS=176} [2024-06-27 23:01:08,148 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 172 predicate places. [2024-06-27 23:01:08,149 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 176 transitions, 2194 flow [2024-06-27 23:01:08,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:08,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:08,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:08,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:01:08,149 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:08,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1149876738, now seen corresponding path program 7 times [2024-06-27 23:01:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:08,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899510913] [2024-06-27 23:01:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:08,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899510913] [2024-06-27 23:01:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899510913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:08,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278310114] [2024-06-27 23:01:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:08,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:08,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 176 transitions, 2194 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:08,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:08,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:08,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:09,030 INFO L124 PetriNetUnfolderBase]: 606/1199 cut-off events. [2024-06-27 23:01:09,030 INFO L125 PetriNetUnfolderBase]: For 43636/43636 co-relation queries the response was YES. [2024-06-27 23:01:09,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7345 conditions, 1199 events. 606/1199 cut-off events. For 43636/43636 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7343 event pairs, 89 based on Foata normal form. 3/1201 useless extension candidates. Maximal degree in co-relation 7246. Up to 475 conditions per place. [2024-06-27 23:01:09,040 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 135 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2024-06-27 23:01:09,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 198 transitions, 3006 flow [2024-06-27 23:01:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:01:09,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 23:01:09,041 INFO L175 Difference]: Start difference. First operand has 203 places, 176 transitions, 2194 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:01:09,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 198 transitions, 3006 flow [2024-06-27 23:01:09,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 198 transitions, 2868 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:09,176 INFO L231 Difference]: Finished difference. Result has 204 places, 178 transitions, 2212 flow [2024-06-27 23:01:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2212, PETRI_PLACES=204, PETRI_TRANSITIONS=178} [2024-06-27 23:01:09,176 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 173 predicate places. [2024-06-27 23:01:09,177 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 178 transitions, 2212 flow [2024-06-27 23:01:09,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:09,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:01:09,177 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:09,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash -999930866, now seen corresponding path program 8 times [2024-06-27 23:01:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312495482] [2024-06-27 23:01:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:09,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:09,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312495482] [2024-06-27 23:01:09,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312495482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:09,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:09,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713993630] [2024-06-27 23:01:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:09,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:09,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:09,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:09,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 178 transitions, 2212 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:09,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:09,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:09,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:10,184 INFO L124 PetriNetUnfolderBase]: 613/1212 cut-off events. [2024-06-27 23:01:10,184 INFO L125 PetriNetUnfolderBase]: For 45014/45014 co-relation queries the response was YES. [2024-06-27 23:01:10,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 1212 events. 613/1212 cut-off events. For 45014/45014 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7467 event pairs, 89 based on Foata normal form. 3/1214 useless extension candidates. Maximal degree in co-relation 7346. Up to 475 conditions per place. [2024-06-27 23:01:10,193 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 137 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-27 23:01:10,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 199 transitions, 3016 flow [2024-06-27 23:01:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:01:10,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 23:01:10,194 INFO L175 Difference]: Start difference. First operand has 204 places, 178 transitions, 2212 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:01:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 199 transitions, 3016 flow [2024-06-27 23:01:10,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 199 transitions, 2875 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:10,332 INFO L231 Difference]: Finished difference. Result has 207 places, 179 transitions, 2209 flow [2024-06-27 23:01:10,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2209, PETRI_PLACES=207, PETRI_TRANSITIONS=179} [2024-06-27 23:01:10,333 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2024-06-27 23:01:10,333 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 179 transitions, 2209 flow [2024-06-27 23:01:10,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:10,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:01:10,333 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:10,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1000103846, now seen corresponding path program 9 times [2024-06-27 23:01:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797779730] [2024-06-27 23:01:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:10,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797779730] [2024-06-27 23:01:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797779730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:10,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156248308] [2024-06-27 23:01:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:10,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:10,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 179 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:10,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:10,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:10,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:11,380 INFO L124 PetriNetUnfolderBase]: 650/1303 cut-off events. [2024-06-27 23:01:11,380 INFO L125 PetriNetUnfolderBase]: For 65816/65816 co-relation queries the response was YES. [2024-06-27 23:01:11,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7887 conditions, 1303 events. 650/1303 cut-off events. For 65816/65816 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8119 event pairs, 99 based on Foata normal form. 12/1314 useless extension candidates. Maximal degree in co-relation 7788. Up to 475 conditions per place. [2024-06-27 23:01:11,391 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 132 selfloop transitions, 55 changer transitions 15/207 dead transitions. [2024-06-27 23:01:11,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 207 transitions, 3045 flow [2024-06-27 23:01:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 23:01:11,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 23:01:11,392 INFO L175 Difference]: Start difference. First operand has 207 places, 179 transitions, 2209 flow. Second operand 10 states and 155 transitions. [2024-06-27 23:01:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 207 transitions, 3045 flow [2024-06-27 23:01:11,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 207 transitions, 2925 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:11,548 INFO L231 Difference]: Finished difference. Result has 213 places, 175 transitions, 2168 flow [2024-06-27 23:01:11,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2168, PETRI_PLACES=213, PETRI_TRANSITIONS=175} [2024-06-27 23:01:11,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2024-06-27 23:01:11,549 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 175 transitions, 2168 flow [2024-06-27 23:01:11,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:11,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:11,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:11,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:01:11,550 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:11,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:11,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1336628260, now seen corresponding path program 1 times [2024-06-27 23:01:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:11,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64877000] [2024-06-27 23:01:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:11,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:12,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64877000] [2024-06-27 23:01:12,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64877000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:12,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:12,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:12,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730807524] [2024-06-27 23:01:12,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:12,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:12,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:12,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:12,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 175 transitions, 2168 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:12,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:12,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:12,618 INFO L124 PetriNetUnfolderBase]: 613/1230 cut-off events. [2024-06-27 23:01:12,618 INFO L125 PetriNetUnfolderBase]: For 56650/56650 co-relation queries the response was YES. [2024-06-27 23:01:12,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7546 conditions, 1230 events. 613/1230 cut-off events. For 56650/56650 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7591 event pairs, 249 based on Foata normal form. 4/1233 useless extension candidates. Maximal degree in co-relation 7444. Up to 1068 conditions per place. [2024-06-27 23:01:12,628 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 171 selfloop transitions, 16 changer transitions 0/191 dead transitions. [2024-06-27 23:01:12,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 191 transitions, 2716 flow [2024-06-27 23:01:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-27 23:01:12,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 23:01:12,629 INFO L175 Difference]: Start difference. First operand has 213 places, 175 transitions, 2168 flow. Second operand 10 states and 128 transitions. [2024-06-27 23:01:12,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 191 transitions, 2716 flow [2024-06-27 23:01:12,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 191 transitions, 2584 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 23:01:12,757 INFO L231 Difference]: Finished difference. Result has 208 places, 176 transitions, 2100 flow [2024-06-27 23:01:12,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2100, PETRI_PLACES=208, PETRI_TRANSITIONS=176} [2024-06-27 23:01:12,758 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-06-27 23:01:12,758 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 176 transitions, 2100 flow [2024-06-27 23:01:12,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:12,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:12,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:12,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:01:12,759 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:12,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1336628570, now seen corresponding path program 4 times [2024-06-27 23:01:12,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:12,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111479683] [2024-06-27 23:01:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:12,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:13,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111479683] [2024-06-27 23:01:13,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111479683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:13,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:13,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:13,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577645767] [2024-06-27 23:01:13,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:13,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:13,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:13,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:13,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 176 transitions, 2100 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:13,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:13,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:13,700 INFO L124 PetriNetUnfolderBase]: 615/1235 cut-off events. [2024-06-27 23:01:13,701 INFO L125 PetriNetUnfolderBase]: For 48368/48368 co-relation queries the response was YES. [2024-06-27 23:01:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7315 conditions, 1235 events. 615/1235 cut-off events. For 48368/48368 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7602 event pairs, 244 based on Foata normal form. 3/1237 useless extension candidates. Maximal degree in co-relation 7215. Up to 1071 conditions per place. [2024-06-27 23:01:13,710 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 170 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2024-06-27 23:01:13,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 191 transitions, 2644 flow [2024-06-27 23:01:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-27 23:01:13,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2024-06-27 23:01:13,712 INFO L175 Difference]: Start difference. First operand has 208 places, 176 transitions, 2100 flow. Second operand 9 states and 118 transitions. [2024-06-27 23:01:13,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 191 transitions, 2644 flow [2024-06-27 23:01:13,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 191 transitions, 2594 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:13,850 INFO L231 Difference]: Finished difference. Result has 209 places, 178 transitions, 2118 flow [2024-06-27 23:01:13,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2052, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=209, PETRI_TRANSITIONS=178} [2024-06-27 23:01:13,851 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 178 predicate places. [2024-06-27 23:01:13,851 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 178 transitions, 2118 flow [2024-06-27 23:01:13,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:13,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:13,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:13,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:01:13,852 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:13,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 22879832, now seen corresponding path program 5 times [2024-06-27 23:01:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:13,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617712608] [2024-06-27 23:01:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:13,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:14,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:14,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617712608] [2024-06-27 23:01:14,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617712608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:14,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:14,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:14,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722779771] [2024-06-27 23:01:14,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:14,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:14,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:14,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:14,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 178 transitions, 2118 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:14,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:14,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:14,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:14,894 INFO L124 PetriNetUnfolderBase]: 622/1245 cut-off events. [2024-06-27 23:01:14,894 INFO L125 PetriNetUnfolderBase]: For 49619/49619 co-relation queries the response was YES. [2024-06-27 23:01:14,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 1245 events. 622/1245 cut-off events. For 49619/49619 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7697 event pairs, 138 based on Foata normal form. 3/1247 useless extension candidates. Maximal degree in co-relation 7375. Up to 987 conditions per place. [2024-06-27 23:01:14,905 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 132 selfloop transitions, 54 changer transitions 0/190 dead transitions. [2024-06-27 23:01:14,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 190 transitions, 2560 flow [2024-06-27 23:01:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 23:01:14,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-27 23:01:14,906 INFO L175 Difference]: Start difference. First operand has 209 places, 178 transitions, 2118 flow. Second operand 9 states and 125 transitions. [2024-06-27 23:01:14,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 190 transitions, 2560 flow [2024-06-27 23:01:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 190 transitions, 2520 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:15,061 INFO L231 Difference]: Finished difference. Result has 212 places, 179 transitions, 2224 flow [2024-06-27 23:01:15,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2224, PETRI_PLACES=212, PETRI_TRANSITIONS=179} [2024-06-27 23:01:15,061 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-06-27 23:01:15,061 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 179 transitions, 2224 flow [2024-06-27 23:01:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:15,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:15,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:01:15,062 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:15,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 22879584, now seen corresponding path program 10 times [2024-06-27 23:01:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850455304] [2024-06-27 23:01:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850455304] [2024-06-27 23:01:15,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850455304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:15,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:15,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308150785] [2024-06-27 23:01:15,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:15,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:15,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 179 transitions, 2224 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:15,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:15,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:15,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:15,956 INFO L124 PetriNetUnfolderBase]: 641/1285 cut-off events. [2024-06-27 23:01:15,956 INFO L125 PetriNetUnfolderBase]: For 55881/55881 co-relation queries the response was YES. [2024-06-27 23:01:15,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7911 conditions, 1285 events. 641/1285 cut-off events. For 55881/55881 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7968 event pairs, 78 based on Foata normal form. 3/1287 useless extension candidates. Maximal degree in co-relation 7810. Up to 492 conditions per place. [2024-06-27 23:01:15,967 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 124 selfloop transitions, 74 changer transitions 0/203 dead transitions. [2024-06-27 23:01:15,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 203 transitions, 3072 flow [2024-06-27 23:01:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 23:01:15,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50390625 [2024-06-27 23:01:15,968 INFO L175 Difference]: Start difference. First operand has 212 places, 179 transitions, 2224 flow. Second operand 8 states and 129 transitions. [2024-06-27 23:01:15,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 203 transitions, 3072 flow [2024-06-27 23:01:16,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 203 transitions, 2944 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:16,122 INFO L231 Difference]: Finished difference. Result has 213 places, 181 transitions, 2278 flow [2024-06-27 23:01:16,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=213, PETRI_TRANSITIONS=181} [2024-06-27 23:01:16,122 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2024-06-27 23:01:16,123 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 181 transitions, 2278 flow [2024-06-27 23:01:16,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:16,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:01:16,123 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:16,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1346756518, now seen corresponding path program 11 times [2024-06-27 23:01:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463327279] [2024-06-27 23:01:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:16,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:16,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463327279] [2024-06-27 23:01:16,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463327279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:16,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:16,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:16,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755328561] [2024-06-27 23:01:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:16,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:16,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:16,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:16,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:16,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 181 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:16,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:16,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:16,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:17,007 INFO L124 PetriNetUnfolderBase]: 651/1313 cut-off events. [2024-06-27 23:01:17,008 INFO L125 PetriNetUnfolderBase]: For 65815/65815 co-relation queries the response was YES. [2024-06-27 23:01:17,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7930 conditions, 1313 events. 651/1313 cut-off events. For 65815/65815 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8234 event pairs, 68 based on Foata normal form. 12/1324 useless extension candidates. Maximal degree in co-relation 7829. Up to 483 conditions per place. [2024-06-27 23:01:17,021 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 100 selfloop transitions, 91 changer transitions 10/206 dead transitions. [2024-06-27 23:01:17,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 206 transitions, 2912 flow [2024-06-27 23:01:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 23:01:17,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2024-06-27 23:01:17,022 INFO L175 Difference]: Start difference. First operand has 213 places, 181 transitions, 2278 flow. Second operand 9 states and 139 transitions. [2024-06-27 23:01:17,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 206 transitions, 2912 flow [2024-06-27 23:01:17,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 206 transitions, 2757 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:17,174 INFO L231 Difference]: Finished difference. Result has 218 places, 179 transitions, 2294 flow [2024-06-27 23:01:17,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2294, PETRI_PLACES=218, PETRI_TRANSITIONS=179} [2024-06-27 23:01:17,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-06-27 23:01:17,175 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 179 transitions, 2294 flow [2024-06-27 23:01:17,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:17,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:17,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:17,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:01:17,176 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:17,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1346756270, now seen corresponding path program 6 times [2024-06-27 23:01:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508919359] [2024-06-27 23:01:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508919359] [2024-06-27 23:01:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508919359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578928291] [2024-06-27 23:01:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:17,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:17,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:17,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 179 transitions, 2294 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:17,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:17,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:17,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:18,015 INFO L124 PetriNetUnfolderBase]: 622/1252 cut-off events. [2024-06-27 23:01:18,016 INFO L125 PetriNetUnfolderBase]: For 52405/52405 co-relation queries the response was YES. [2024-06-27 23:01:18,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7644 conditions, 1252 events. 622/1252 cut-off events. For 52405/52405 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7786 event pairs, 135 based on Foata normal form. 3/1254 useless extension candidates. Maximal degree in co-relation 7541. Up to 990 conditions per place. [2024-06-27 23:01:18,025 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 127 selfloop transitions, 58 changer transitions 0/190 dead transitions. [2024-06-27 23:01:18,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 190 transitions, 2704 flow [2024-06-27 23:01:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 23:01:18,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 23:01:18,027 INFO L175 Difference]: Start difference. First operand has 218 places, 179 transitions, 2294 flow. Second operand 8 states and 122 transitions. [2024-06-27 23:01:18,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 190 transitions, 2704 flow [2024-06-27 23:01:18,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 190 transitions, 2452 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 23:01:18,168 INFO L231 Difference]: Finished difference. Result has 214 places, 179 transitions, 2164 flow [2024-06-27 23:01:18,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2164, PETRI_PLACES=214, PETRI_TRANSITIONS=179} [2024-06-27 23:01:18,168 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 183 predicate places. [2024-06-27 23:01:18,168 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 179 transitions, 2164 flow [2024-06-27 23:01:18,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:18,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:18,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:01:18,169 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:18,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1632093538, now seen corresponding path program 12 times [2024-06-27 23:01:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:18,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153965086] [2024-06-27 23:01:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:18,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:18,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153965086] [2024-06-27 23:01:18,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153965086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:18,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:18,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625092597] [2024-06-27 23:01:18,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:18,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:18,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:18,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 179 transitions, 2164 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:18,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:18,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:18,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:19,117 INFO L124 PetriNetUnfolderBase]: 617/1239 cut-off events. [2024-06-27 23:01:19,117 INFO L125 PetriNetUnfolderBase]: For 45027/45027 co-relation queries the response was YES. [2024-06-27 23:01:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7098 conditions, 1239 events. 617/1239 cut-off events. For 45027/45027 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7659 event pairs, 82 based on Foata normal form. 3/1241 useless extension candidates. Maximal degree in co-relation 6995. Up to 472 conditions per place. [2024-06-27 23:01:19,127 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 120 selfloop transitions, 73 changer transitions 0/197 dead transitions. [2024-06-27 23:01:19,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 197 transitions, 2746 flow [2024-06-27 23:01:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 23:01:19,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-27 23:01:19,128 INFO L175 Difference]: Start difference. First operand has 214 places, 179 transitions, 2164 flow. Second operand 9 states and 125 transitions. [2024-06-27 23:01:19,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 197 transitions, 2746 flow [2024-06-27 23:01:19,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 197 transitions, 2595 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:19,314 INFO L231 Difference]: Finished difference. Result has 216 places, 179 transitions, 2163 flow [2024-06-27 23:01:19,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2163, PETRI_PLACES=216, PETRI_TRANSITIONS=179} [2024-06-27 23:01:19,314 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2024-06-27 23:01:19,314 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 179 transitions, 2163 flow [2024-06-27 23:01:19,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:19,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:19,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:19,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:01:19,315 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:19,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:19,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1758243854, now seen corresponding path program 1 times [2024-06-27 23:01:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677594607] [2024-06-27 23:01:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:19,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:20,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:20,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677594607] [2024-06-27 23:01:20,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677594607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:20,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:20,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453689237] [2024-06-27 23:01:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:20,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:20,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:20,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:20,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:20,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 179 transitions, 2163 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:20,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:20,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:20,493 INFO L124 PetriNetUnfolderBase]: 637/1282 cut-off events. [2024-06-27 23:01:20,493 INFO L125 PetriNetUnfolderBase]: For 48832/48832 co-relation queries the response was YES. [2024-06-27 23:01:20,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7325 conditions, 1282 events. 637/1282 cut-off events. For 48832/48832 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8077 event pairs, 109 based on Foata normal form. 4/1285 useless extension candidates. Maximal degree in co-relation 7221. Up to 924 conditions per place. [2024-06-27 23:01:20,503 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 158 selfloop transitions, 39 changer transitions 0/201 dead transitions. [2024-06-27 23:01:20,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 201 transitions, 2654 flow [2024-06-27 23:01:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 23:01:20,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-27 23:01:20,504 INFO L175 Difference]: Start difference. First operand has 216 places, 179 transitions, 2163 flow. Second operand 11 states and 131 transitions. [2024-06-27 23:01:20,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 201 transitions, 2654 flow [2024-06-27 23:01:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 201 transitions, 2491 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:20,671 INFO L231 Difference]: Finished difference. Result has 219 places, 183 transitions, 2155 flow [2024-06-27 23:01:20,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2155, PETRI_PLACES=219, PETRI_TRANSITIONS=183} [2024-06-27 23:01:20,671 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-06-27 23:01:20,671 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 183 transitions, 2155 flow [2024-06-27 23:01:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:20,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:20,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:20,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:01:20,672 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:20,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1563610666, now seen corresponding path program 2 times [2024-06-27 23:01:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:20,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669662970] [2024-06-27 23:01:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:21,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:21,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669662970] [2024-06-27 23:01:21,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669662970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:21,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:21,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:21,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898003911] [2024-06-27 23:01:21,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:21,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:21,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:21,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:21,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:21,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 183 transitions, 2155 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-27 23:01:21,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:21,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:21,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:21,768 INFO L124 PetriNetUnfolderBase]: 687/1387 cut-off events. [2024-06-27 23:01:21,769 INFO L125 PetriNetUnfolderBase]: For 47316/47316 co-relation queries the response was YES. [2024-06-27 23:01:21,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7799 conditions, 1387 events. 687/1387 cut-off events. For 47316/47316 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8930 event pairs, 100 based on Foata normal form. 2/1389 useless extension candidates. Maximal degree in co-relation 7693. Up to 1054 conditions per place. [2024-06-27 23:01:21,780 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 161 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-06-27 23:01:21,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 220 transitions, 2856 flow [2024-06-27 23:01:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:01:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:01:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-27 23:01:21,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-27 23:01:21,784 INFO L175 Difference]: Start difference. First operand has 219 places, 183 transitions, 2155 flow. Second operand 12 states and 148 transitions. [2024-06-27 23:01:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 220 transitions, 2856 flow [2024-06-27 23:01:21,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 220 transitions, 2719 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:21,925 INFO L231 Difference]: Finished difference. Result has 228 places, 199 transitions, 2431 flow [2024-06-27 23:01:21,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2431, PETRI_PLACES=228, PETRI_TRANSITIONS=199} [2024-06-27 23:01:21,925 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2024-06-27 23:01:21,925 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 199 transitions, 2431 flow [2024-06-27 23:01:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-27 23:01:21,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:21,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:21,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:01:21,926 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:21,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:21,926 INFO L85 PathProgramCache]: Analyzing trace with hash 658209213, now seen corresponding path program 1 times [2024-06-27 23:01:21,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:21,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295466389] [2024-06-27 23:01:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:21,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:22,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295466389] [2024-06-27 23:01:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295466389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:22,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040110363] [2024-06-27 23:01:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:22,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:22,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:22,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 199 transitions, 2431 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:22,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:22,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:22,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:22,902 INFO L124 PetriNetUnfolderBase]: 702/1424 cut-off events. [2024-06-27 23:01:22,902 INFO L125 PetriNetUnfolderBase]: For 59733/59733 co-relation queries the response was YES. [2024-06-27 23:01:22,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7993 conditions, 1424 events. 702/1424 cut-off events. For 59733/59733 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9292 event pairs, 133 based on Foata normal form. 9/1433 useless extension candidates. Maximal degree in co-relation 7881. Up to 817 conditions per place. [2024-06-27 23:01:22,915 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 113 selfloop transitions, 76 changer transitions 22/215 dead transitions. [2024-06-27 23:01:22,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 215 transitions, 2917 flow [2024-06-27 23:01:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-27 23:01:22,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-27 23:01:22,934 INFO L175 Difference]: Start difference. First operand has 228 places, 199 transitions, 2431 flow. Second operand 9 states and 122 transitions. [2024-06-27 23:01:22,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 215 transitions, 2917 flow [2024-06-27 23:01:23,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 215 transitions, 2849 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:23,098 INFO L231 Difference]: Finished difference. Result has 233 places, 185 transitions, 2367 flow [2024-06-27 23:01:23,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2367, PETRI_PLACES=233, PETRI_TRANSITIONS=185} [2024-06-27 23:01:23,100 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 202 predicate places. [2024-06-27 23:01:23,100 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 185 transitions, 2367 flow [2024-06-27 23:01:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:23,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:23,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:01:23,101 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:23,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1804508022, now seen corresponding path program 3 times [2024-06-27 23:01:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:23,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921149924] [2024-06-27 23:01:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:23,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:23,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921149924] [2024-06-27 23:01:23,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921149924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:23,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:23,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:23,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15039549] [2024-06-27 23:01:23,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:23,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:23,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:23,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:23,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:23,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:23,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 185 transitions, 2367 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:23,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:23,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:23,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:24,168 INFO L124 PetriNetUnfolderBase]: 618/1248 cut-off events. [2024-06-27 23:01:24,169 INFO L125 PetriNetUnfolderBase]: For 49633/49633 co-relation queries the response was YES. [2024-06-27 23:01:24,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 1248 events. 618/1248 cut-off events. For 49633/49633 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7768 event pairs, 90 based on Foata normal form. 4/1250 useless extension candidates. Maximal degree in co-relation 7260. Up to 847 conditions per place. [2024-06-27 23:01:24,178 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 140 selfloop transitions, 77 changer transitions 0/221 dead transitions. [2024-06-27 23:01:24,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 221 transitions, 3128 flow [2024-06-27 23:01:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:01:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:01:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-27 23:01:24,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 23:01:24,179 INFO L175 Difference]: Start difference. First operand has 233 places, 185 transitions, 2367 flow. Second operand 12 states and 150 transitions. [2024-06-27 23:01:24,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 221 transitions, 3128 flow [2024-06-27 23:01:24,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 221 transitions, 2865 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-27 23:01:24,357 INFO L231 Difference]: Finished difference. Result has 235 places, 202 transitions, 2670 flow [2024-06-27 23:01:24,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2670, PETRI_PLACES=235, PETRI_TRANSITIONS=202} [2024-06-27 23:01:24,358 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2024-06-27 23:01:24,358 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 202 transitions, 2670 flow [2024-06-27 23:01:24,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:24,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:24,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:24,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:01:24,360 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:24,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash 520861198, now seen corresponding path program 4 times [2024-06-27 23:01:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:24,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865136074] [2024-06-27 23:01:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865136074] [2024-06-27 23:01:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865136074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:25,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:25,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020002280] [2024-06-27 23:01:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:25,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:25,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 202 transitions, 2670 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:25,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:25,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:25,663 INFO L124 PetriNetUnfolderBase]: 657/1340 cut-off events. [2024-06-27 23:01:25,663 INFO L125 PetriNetUnfolderBase]: For 72710/72710 co-relation queries the response was YES. [2024-06-27 23:01:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8161 conditions, 1340 events. 657/1340 cut-off events. For 72710/72710 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8502 event pairs, 105 based on Foata normal form. 11/1351 useless extension candidates. Maximal degree in co-relation 8051. Up to 574 conditions per place. [2024-06-27 23:01:25,676 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 140 selfloop transitions, 47 changer transitions 37/228 dead transitions. [2024-06-27 23:01:25,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 228 transitions, 3348 flow [2024-06-27 23:01:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-27 23:01:25,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 23:01:25,677 INFO L175 Difference]: Start difference. First operand has 235 places, 202 transitions, 2670 flow. Second operand 11 states and 140 transitions. [2024-06-27 23:01:25,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 228 transitions, 3348 flow [2024-06-27 23:01:25,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 228 transitions, 3273 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:25,951 INFO L231 Difference]: Finished difference. Result has 242 places, 176 transitions, 2402 flow [2024-06-27 23:01:25,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2402, PETRI_PLACES=242, PETRI_TRANSITIONS=176} [2024-06-27 23:01:25,952 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 211 predicate places. [2024-06-27 23:01:25,952 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 176 transitions, 2402 flow [2024-06-27 23:01:25,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:25,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:25,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:25,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:01:25,953 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:25,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1723952609, now seen corresponding path program 2 times [2024-06-27 23:01:25,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:25,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517025915] [2024-06-27 23:01:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:25,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:26,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:26,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517025915] [2024-06-27 23:01:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517025915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 23:01:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87855161] [2024-06-27 23:01:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:26,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 23:01:26,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 23:01:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 23:01:26,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:26,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 176 transitions, 2402 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:26,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:26,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:26,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:27,225 INFO L124 PetriNetUnfolderBase]: 579/1200 cut-off events. [2024-06-27 23:01:27,225 INFO L125 PetriNetUnfolderBase]: For 71837/71837 co-relation queries the response was YES. [2024-06-27 23:01:27,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 1200 events. 579/1200 cut-off events. For 71837/71837 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7513 event pairs, 125 based on Foata normal form. 9/1209 useless extension candidates. Maximal degree in co-relation 7385. Up to 901 conditions per place. [2024-06-27 23:01:27,235 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 122 selfloop transitions, 58 changer transitions 8/192 dead transitions. [2024-06-27 23:01:27,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 192 transitions, 2842 flow [2024-06-27 23:01:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-27 23:01:27,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 23:01:27,236 INFO L175 Difference]: Start difference. First operand has 242 places, 176 transitions, 2402 flow. Second operand 10 states and 131 transitions. [2024-06-27 23:01:27,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 192 transitions, 2842 flow [2024-06-27 23:01:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 192 transitions, 2728 flow, removed 8 selfloop flow, removed 16 redundant places. [2024-06-27 23:01:27,426 INFO L231 Difference]: Finished difference. Result has 225 places, 176 transitions, 2414 flow [2024-06-27 23:01:27,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2414, PETRI_PLACES=225, PETRI_TRANSITIONS=176} [2024-06-27 23:01:27,426 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2024-06-27 23:01:27,426 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 176 transitions, 2414 flow [2024-06-27 23:01:27,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:27,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:27,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:01:27,427 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:27,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2094646705, now seen corresponding path program 3 times [2024-06-27 23:01:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:27,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070563612] [2024-06-27 23:01:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:28,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070563612] [2024-06-27 23:01:28,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070563612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:28,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:28,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534929771] [2024-06-27 23:01:28,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:28,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:28,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:28,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 176 transitions, 2414 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:28,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:28,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:28,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:28,652 INFO L124 PetriNetUnfolderBase]: 573/1196 cut-off events. [2024-06-27 23:01:28,652 INFO L125 PetriNetUnfolderBase]: For 56784/56784 co-relation queries the response was YES. [2024-06-27 23:01:28,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7291 conditions, 1196 events. 573/1196 cut-off events. For 56784/56784 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7532 event pairs, 89 based on Foata normal form. 9/1205 useless extension candidates. Maximal degree in co-relation 7204. Up to 638 conditions per place. [2024-06-27 23:01:28,661 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 111 selfloop transitions, 63 changer transitions 20/198 dead transitions. [2024-06-27 23:01:28,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 198 transitions, 2907 flow [2024-06-27 23:01:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 23:01:28,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 23:01:28,663 INFO L175 Difference]: Start difference. First operand has 225 places, 176 transitions, 2414 flow. Second operand 10 states and 125 transitions. [2024-06-27 23:01:28,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 198 transitions, 2907 flow [2024-06-27 23:01:28,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 198 transitions, 2788 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:28,821 INFO L231 Difference]: Finished difference. Result has 227 places, 166 transitions, 2279 flow [2024-06-27 23:01:28,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2279, PETRI_PLACES=227, PETRI_TRANSITIONS=166} [2024-06-27 23:01:28,821 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 196 predicate places. [2024-06-27 23:01:28,821 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 166 transitions, 2279 flow [2024-06-27 23:01:28,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:28,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:28,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:01:28,822 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:28,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2094639265, now seen corresponding path program 4 times [2024-06-27 23:01:28,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110377983] [2024-06-27 23:01:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:29,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110377983] [2024-06-27 23:01:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110377983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:29,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772003487] [2024-06-27 23:01:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:29,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:29,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:29,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:29,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 166 transitions, 2279 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:29,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:29,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:29,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:30,262 INFO L124 PetriNetUnfolderBase]: 578/1221 cut-off events. [2024-06-27 23:01:30,262 INFO L125 PetriNetUnfolderBase]: For 59277/59277 co-relation queries the response was YES. [2024-06-27 23:01:30,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7748 conditions, 1221 events. 578/1221 cut-off events. For 59277/59277 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7844 event pairs, 133 based on Foata normal form. 3/1224 useless extension candidates. Maximal degree in co-relation 7661. Up to 782 conditions per place. [2024-06-27 23:01:30,272 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 124 selfloop transitions, 61 changer transitions 0/190 dead transitions. [2024-06-27 23:01:30,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 190 transitions, 2915 flow [2024-06-27 23:01:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 23:01:30,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 23:01:30,273 INFO L175 Difference]: Start difference. First operand has 227 places, 166 transitions, 2279 flow. Second operand 9 states and 135 transitions. [2024-06-27 23:01:30,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 190 transitions, 2915 flow [2024-06-27 23:01:30,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 190 transitions, 2745 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 23:01:30,442 INFO L231 Difference]: Finished difference. Result has 224 places, 169 transitions, 2303 flow [2024-06-27 23:01:30,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2303, PETRI_PLACES=224, PETRI_TRANSITIONS=169} [2024-06-27 23:01:30,442 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-06-27 23:01:30,442 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 169 transitions, 2303 flow [2024-06-27 23:01:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:30,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:30,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:01:30,443 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:30,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 938860803, now seen corresponding path program 5 times [2024-06-27 23:01:30,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:30,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103487983] [2024-06-27 23:01:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:31,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:31,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103487983] [2024-06-27 23:01:31,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103487983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:31,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:31,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606650904] [2024-06-27 23:01:31,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:31,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:31,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:31,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:31,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:31,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:31,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 169 transitions, 2303 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:31,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:31,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:31,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:31,717 INFO L124 PetriNetUnfolderBase]: 585/1244 cut-off events. [2024-06-27 23:01:31,718 INFO L125 PetriNetUnfolderBase]: For 61070/61070 co-relation queries the response was YES. [2024-06-27 23:01:31,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7684 conditions, 1244 events. 585/1244 cut-off events. For 61070/61070 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8113 event pairs, 137 based on Foata normal form. 9/1253 useless extension candidates. Maximal degree in co-relation 7598. Up to 976 conditions per place. [2024-06-27 23:01:31,728 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 143 selfloop transitions, 25 changer transitions 15/187 dead transitions. [2024-06-27 23:01:31,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 187 transitions, 2761 flow [2024-06-27 23:01:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 23:01:31,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 23:01:31,729 INFO L175 Difference]: Start difference. First operand has 224 places, 169 transitions, 2303 flow. Second operand 10 states and 130 transitions. [2024-06-27 23:01:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 187 transitions, 2761 flow [2024-06-27 23:01:31,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 187 transitions, 2649 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:31,880 INFO L231 Difference]: Finished difference. Result has 229 places, 166 transitions, 2206 flow [2024-06-27 23:01:31,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2206, PETRI_PLACES=229, PETRI_TRANSITIONS=166} [2024-06-27 23:01:31,881 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 198 predicate places. [2024-06-27 23:01:31,881 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 166 transitions, 2206 flow [2024-06-27 23:01:31,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:31,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:31,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:31,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:01:31,882 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:31,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash 939070053, now seen corresponding path program 6 times [2024-06-27 23:01:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:31,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774575643] [2024-06-27 23:01:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:31,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:33,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:33,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774575643] [2024-06-27 23:01:33,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774575643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:33,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:33,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:33,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077197091] [2024-06-27 23:01:33,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:33,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:33,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:33,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:33,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:33,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:33,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 166 transitions, 2206 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:33,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:33,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:33,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:33,474 INFO L124 PetriNetUnfolderBase]: 610/1311 cut-off events. [2024-06-27 23:01:33,474 INFO L125 PetriNetUnfolderBase]: For 77301/77301 co-relation queries the response was YES. [2024-06-27 23:01:33,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8622 conditions, 1311 events. 610/1311 cut-off events. For 77301/77301 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8666 event pairs, 169 based on Foata normal form. 3/1314 useless extension candidates. Maximal degree in co-relation 8534. Up to 886 conditions per place. [2024-06-27 23:01:33,486 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 145 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-06-27 23:01:33,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 186 transitions, 2772 flow [2024-06-27 23:01:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-27 23:01:33,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-06-27 23:01:33,487 INFO L175 Difference]: Start difference. First operand has 229 places, 166 transitions, 2206 flow. Second operand 9 states and 130 transitions. [2024-06-27 23:01:33,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 186 transitions, 2772 flow [2024-06-27 23:01:33,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 186 transitions, 2710 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:33,696 INFO L231 Difference]: Finished difference. Result has 226 places, 170 transitions, 2270 flow [2024-06-27 23:01:33,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2270, PETRI_PLACES=226, PETRI_TRANSITIONS=170} [2024-06-27 23:01:33,697 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2024-06-27 23:01:33,697 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 170 transitions, 2270 flow [2024-06-27 23:01:33,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:33,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:33,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:33,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:01:33,697 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:33,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:33,698 INFO L85 PathProgramCache]: Analyzing trace with hash -731785627, now seen corresponding path program 7 times [2024-06-27 23:01:33,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:33,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941219868] [2024-06-27 23:01:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:33,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941219868] [2024-06-27 23:01:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941219868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:34,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:34,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887974329] [2024-06-27 23:01:34,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:34,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:34,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 170 transitions, 2270 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:34,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:34,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:34,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:35,299 INFO L124 PetriNetUnfolderBase]: 666/1431 cut-off events. [2024-06-27 23:01:35,299 INFO L125 PetriNetUnfolderBase]: For 99708/99708 co-relation queries the response was YES. [2024-06-27 23:01:35,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10152 conditions, 1431 events. 666/1431 cut-off events. For 99708/99708 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9713 event pairs, 151 based on Foata normal form. 3/1434 useless extension candidates. Maximal degree in co-relation 10065. Up to 653 conditions per place. [2024-06-27 23:01:35,312 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 140 selfloop transitions, 51 changer transitions 0/195 dead transitions. [2024-06-27 23:01:35,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 195 transitions, 2908 flow [2024-06-27 23:01:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-27 23:01:35,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:01:35,314 INFO L175 Difference]: Start difference. First operand has 226 places, 170 transitions, 2270 flow. Second operand 11 states and 154 transitions. [2024-06-27 23:01:35,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 195 transitions, 2908 flow [2024-06-27 23:01:35,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 195 transitions, 2830 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:35,550 INFO L231 Difference]: Finished difference. Result has 230 places, 172 transitions, 2330 flow [2024-06-27 23:01:35,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2330, PETRI_PLACES=230, PETRI_TRANSITIONS=172} [2024-06-27 23:01:35,551 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 199 predicate places. [2024-06-27 23:01:35,551 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 172 transitions, 2330 flow [2024-06-27 23:01:35,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:35,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:35,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:01:35,552 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:35,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1293591997, now seen corresponding path program 8 times [2024-06-27 23:01:35,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:35,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064721085] [2024-06-27 23:01:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:36,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:36,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064721085] [2024-06-27 23:01:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064721085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:36,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:36,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:36,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465508980] [2024-06-27 23:01:36,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:36,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:36,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:36,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 172 transitions, 2330 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:36,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:36,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:36,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:36,813 INFO L124 PetriNetUnfolderBase]: 637/1364 cut-off events. [2024-06-27 23:01:36,813 INFO L125 PetriNetUnfolderBase]: For 89162/89162 co-relation queries the response was YES. [2024-06-27 23:01:36,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9368 conditions, 1364 events. 637/1364 cut-off events. For 89162/89162 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9146 event pairs, 116 based on Foata normal form. 9/1373 useless extension candidates. Maximal degree in co-relation 9280. Up to 723 conditions per place. [2024-06-27 23:01:36,826 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 133 selfloop transitions, 45 changer transitions 10/192 dead transitions. [2024-06-27 23:01:36,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 192 transitions, 2836 flow [2024-06-27 23:01:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-27 23:01:36,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 23:01:36,827 INFO L175 Difference]: Start difference. First operand has 230 places, 172 transitions, 2330 flow. Second operand 10 states and 139 transitions. [2024-06-27 23:01:36,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 192 transitions, 2836 flow [2024-06-27 23:01:37,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 192 transitions, 2716 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:37,039 INFO L231 Difference]: Finished difference. Result has 231 places, 170 transitions, 2287 flow [2024-06-27 23:01:37,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2287, PETRI_PLACES=231, PETRI_TRANSITIONS=170} [2024-06-27 23:01:37,039 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2024-06-27 23:01:37,040 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 170 transitions, 2287 flow [2024-06-27 23:01:37,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:37,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:37,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:37,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:01:37,040 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:37,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash -933084127, now seen corresponding path program 9 times [2024-06-27 23:01:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838012648] [2024-06-27 23:01:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:37,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838012648] [2024-06-27 23:01:37,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838012648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:37,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:37,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81642382] [2024-06-27 23:01:37,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:38,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:38,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 170 transitions, 2287 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:38,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:38,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:38,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:38,409 INFO L124 PetriNetUnfolderBase]: 579/1233 cut-off events. [2024-06-27 23:01:38,410 INFO L125 PetriNetUnfolderBase]: For 67882/67882 co-relation queries the response was YES. [2024-06-27 23:01:38,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7932 conditions, 1233 events. 579/1233 cut-off events. For 67882/67882 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8044 event pairs, 94 based on Foata normal form. 9/1242 useless extension candidates. Maximal degree in co-relation 7843. Up to 617 conditions per place. [2024-06-27 23:01:38,419 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 129 selfloop transitions, 41 changer transitions 14/188 dead transitions. [2024-06-27 23:01:38,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 188 transitions, 2765 flow [2024-06-27 23:01:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-27 23:01:38,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 23:01:38,420 INFO L175 Difference]: Start difference. First operand has 231 places, 170 transitions, 2287 flow. Second operand 10 states and 136 transitions. [2024-06-27 23:01:38,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 188 transitions, 2765 flow [2024-06-27 23:01:38,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 188 transitions, 2671 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:38,579 INFO L231 Difference]: Finished difference. Result has 229 places, 167 transitions, 2254 flow [2024-06-27 23:01:38,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2254, PETRI_PLACES=229, PETRI_TRANSITIONS=167} [2024-06-27 23:01:38,580 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 198 predicate places. [2024-06-27 23:01:38,580 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 167 transitions, 2254 flow [2024-06-27 23:01:38,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:38,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:38,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:38,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:01:38,580 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:38,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash 952068611, now seen corresponding path program 10 times [2024-06-27 23:01:38,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:38,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788454872] [2024-06-27 23:01:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788454872] [2024-06-27 23:01:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788454872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560514240] [2024-06-27 23:01:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:39,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:39,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 167 transitions, 2254 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:39,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:39,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:39,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:40,142 INFO L124 PetriNetUnfolderBase]: 577/1233 cut-off events. [2024-06-27 23:01:40,142 INFO L125 PetriNetUnfolderBase]: For 68025/68025 co-relation queries the response was YES. [2024-06-27 23:01:40,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8293 conditions, 1233 events. 577/1233 cut-off events. For 68025/68025 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8019 event pairs, 92 based on Foata normal form. 3/1236 useless extension candidates. Maximal degree in co-relation 8205. Up to 508 conditions per place. [2024-06-27 23:01:40,152 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 124 selfloop transitions, 64 changer transitions 0/192 dead transitions. [2024-06-27 23:01:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 192 transitions, 2900 flow [2024-06-27 23:01:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-27 23:01:40,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 23:01:40,170 INFO L175 Difference]: Start difference. First operand has 229 places, 167 transitions, 2254 flow. Second operand 11 states and 152 transitions. [2024-06-27 23:01:40,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 192 transitions, 2900 flow [2024-06-27 23:01:40,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 192 transitions, 2806 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:40,355 INFO L231 Difference]: Finished difference. Result has 226 places, 169 transitions, 2334 flow [2024-06-27 23:01:40,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2334, PETRI_PLACES=226, PETRI_TRANSITIONS=169} [2024-06-27 23:01:40,356 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2024-06-27 23:01:40,356 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 169 transitions, 2334 flow [2024-06-27 23:01:40,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:40,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:40,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:40,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:01:40,357 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:40,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash 952061171, now seen corresponding path program 11 times [2024-06-27 23:01:40,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:40,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255431739] [2024-06-27 23:01:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:40,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:41,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255431739] [2024-06-27 23:01:41,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255431739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:41,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:41,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:41,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613959752] [2024-06-27 23:01:41,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:41,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:41,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:41,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:41,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 169 transitions, 2334 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:41,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:41,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:41,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:41,686 INFO L124 PetriNetUnfolderBase]: 592/1270 cut-off events. [2024-06-27 23:01:41,686 INFO L125 PetriNetUnfolderBase]: For 71227/71227 co-relation queries the response was YES. [2024-06-27 23:01:41,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8553 conditions, 1270 events. 592/1270 cut-off events. For 71227/71227 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8348 event pairs, 94 based on Foata normal form. 9/1279 useless extension candidates. Maximal degree in co-relation 8467. Up to 670 conditions per place. [2024-06-27 23:01:41,697 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 116 selfloop transitions, 58 changer transitions 10/188 dead transitions. [2024-06-27 23:01:41,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 188 transitions, 2824 flow [2024-06-27 23:01:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-27 23:01:41,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 23:01:41,699 INFO L175 Difference]: Start difference. First operand has 226 places, 169 transitions, 2334 flow. Second operand 10 states and 137 transitions. [2024-06-27 23:01:41,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 188 transitions, 2824 flow [2024-06-27 23:01:41,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 188 transitions, 2674 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:41,900 INFO L231 Difference]: Finished difference. Result has 227 places, 167 transitions, 2287 flow [2024-06-27 23:01:41,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2287, PETRI_PLACES=227, PETRI_TRANSITIONS=167} [2024-06-27 23:01:41,900 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 196 predicate places. [2024-06-27 23:01:41,900 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 167 transitions, 2287 flow [2024-06-27 23:01:41,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:41,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:41,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:41,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:01:41,901 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:41,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1324872711, now seen corresponding path program 12 times [2024-06-27 23:01:41,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:41,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053902238] [2024-06-27 23:01:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:41,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:42,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053902238] [2024-06-27 23:01:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053902238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:42,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314549576] [2024-06-27 23:01:42,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:42,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:42,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 167 transitions, 2287 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:42,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:42,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:42,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:43,067 INFO L124 PetriNetUnfolderBase]: 534/1139 cut-off events. [2024-06-27 23:01:43,067 INFO L125 PetriNetUnfolderBase]: For 51273/51273 co-relation queries the response was YES. [2024-06-27 23:01:43,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7101 conditions, 1139 events. 534/1139 cut-off events. For 51273/51273 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7277 event pairs, 72 based on Foata normal form. 9/1148 useless extension candidates. Maximal degree in co-relation 7014. Up to 564 conditions per place. [2024-06-27 23:01:43,076 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 112 selfloop transitions, 53 changer transitions 14/184 dead transitions. [2024-06-27 23:01:43,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 184 transitions, 2745 flow [2024-06-27 23:01:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-27 23:01:43,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2024-06-27 23:01:43,078 INFO L175 Difference]: Start difference. First operand has 227 places, 167 transitions, 2287 flow. Second operand 9 states and 133 transitions. [2024-06-27 23:01:43,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 184 transitions, 2745 flow [2024-06-27 23:01:43,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 184 transitions, 2625 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:43,218 INFO L231 Difference]: Finished difference. Result has 224 places, 164 transitions, 2252 flow [2024-06-27 23:01:43,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2252, PETRI_PLACES=224, PETRI_TRANSITIONS=164} [2024-06-27 23:01:43,219 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-06-27 23:01:43,219 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 164 transitions, 2252 flow [2024-06-27 23:01:43,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:43,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:43,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:43,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:01:43,220 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:43,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1200489459, now seen corresponding path program 13 times [2024-06-27 23:01:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:43,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716859173] [2024-06-27 23:01:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:44,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:44,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716859173] [2024-06-27 23:01:44,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716859173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:44,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:44,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:44,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647701877] [2024-06-27 23:01:44,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:44,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:44,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:44,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:44,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 164 transitions, 2252 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:44,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:44,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:44,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:44,679 INFO L124 PetriNetUnfolderBase]: 533/1148 cut-off events. [2024-06-27 23:01:44,679 INFO L125 PetriNetUnfolderBase]: For 56726/56726 co-relation queries the response was YES. [2024-06-27 23:01:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1148 events. 533/1148 cut-off events. For 56726/56726 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7397 event pairs, 69 based on Foata normal form. 9/1157 useless extension candidates. Maximal degree in co-relation 7272. Up to 521 conditions per place. [2024-06-27 23:01:44,687 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 99 selfloop transitions, 78 changer transitions 2/184 dead transitions. [2024-06-27 23:01:44,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 184 transitions, 2826 flow [2024-06-27 23:01:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 23:01:44,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:01:44,688 INFO L175 Difference]: Start difference. First operand has 224 places, 164 transitions, 2252 flow. Second operand 9 states and 136 transitions. [2024-06-27 23:01:44,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 184 transitions, 2826 flow [2024-06-27 23:01:44,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 184 transitions, 2708 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:44,816 INFO L231 Difference]: Finished difference. Result has 219 places, 165 transitions, 2317 flow [2024-06-27 23:01:44,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2317, PETRI_PLACES=219, PETRI_TRANSITIONS=165} [2024-06-27 23:01:44,817 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-06-27 23:01:44,817 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 165 transitions, 2317 flow [2024-06-27 23:01:44,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:44,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:44,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:44,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:01:44,818 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:44,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:44,818 INFO L85 PathProgramCache]: Analyzing trace with hash -755393543, now seen corresponding path program 14 times [2024-06-27 23:01:44,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:44,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636864290] [2024-06-27 23:01:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:44,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:45,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:45,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636864290] [2024-06-27 23:01:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636864290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:45,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:45,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:45,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459391182] [2024-06-27 23:01:45,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:45,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:45,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:45,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:45,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 165 transitions, 2317 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:45,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:45,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:45,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:45,920 INFO L124 PetriNetUnfolderBase]: 543/1179 cut-off events. [2024-06-27 23:01:45,921 INFO L125 PetriNetUnfolderBase]: For 51959/51959 co-relation queries the response was YES. [2024-06-27 23:01:45,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7505 conditions, 1179 events. 543/1179 cut-off events. For 51959/51959 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7693 event pairs, 83 based on Foata normal form. 9/1188 useless extension candidates. Maximal degree in co-relation 7421. Up to 599 conditions per place. [2024-06-27 23:01:45,930 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 93 selfloop transitions, 80 changer transitions 2/180 dead transitions. [2024-06-27 23:01:45,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 180 transitions, 2729 flow [2024-06-27 23:01:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 23:01:45,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 23:01:45,932 INFO L175 Difference]: Start difference. First operand has 219 places, 165 transitions, 2317 flow. Second operand 10 states and 142 transitions. [2024-06-27 23:01:45,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 180 transitions, 2729 flow [2024-06-27 23:01:46,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 180 transitions, 2572 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:46,077 INFO L231 Difference]: Finished difference. Result has 222 places, 166 transitions, 2342 flow [2024-06-27 23:01:46,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2342, PETRI_PLACES=222, PETRI_TRANSITIONS=166} [2024-06-27 23:01:46,077 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 191 predicate places. [2024-06-27 23:01:46,077 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 166 transitions, 2342 flow [2024-06-27 23:01:46,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:46,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:46,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:46,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:01:46,078 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:46,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash -755393264, now seen corresponding path program 1 times [2024-06-27 23:01:46,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:46,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142296102] [2024-06-27 23:01:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:46,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142296102] [2024-06-27 23:01:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142296102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:46,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:46,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:01:46,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174258342] [2024-06-27 23:01:46,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:01:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:46,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:01:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:01:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 166 transitions, 2342 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:46,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:46,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:46,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:47,334 INFO L124 PetriNetUnfolderBase]: 525/1143 cut-off events. [2024-06-27 23:01:47,334 INFO L125 PetriNetUnfolderBase]: For 36354/36354 co-relation queries the response was YES. [2024-06-27 23:01:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7048 conditions, 1143 events. 525/1143 cut-off events. For 36354/36354 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7412 event pairs, 221 based on Foata normal form. 2/1145 useless extension candidates. Maximal degree in co-relation 6963. Up to 975 conditions per place. [2024-06-27 23:01:47,344 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 156 selfloop transitions, 16 changer transitions 3/180 dead transitions. [2024-06-27 23:01:47,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 180 transitions, 2750 flow [2024-06-27 23:01:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-27 23:01:47,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-27 23:01:47,345 INFO L175 Difference]: Start difference. First operand has 222 places, 166 transitions, 2342 flow. Second operand 9 states and 127 transitions. [2024-06-27 23:01:47,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 180 transitions, 2750 flow [2024-06-27 23:01:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 180 transitions, 2570 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:47,474 INFO L231 Difference]: Finished difference. Result has 223 places, 166 transitions, 2200 flow [2024-06-27 23:01:47,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2200, PETRI_PLACES=223, PETRI_TRANSITIONS=166} [2024-06-27 23:01:47,474 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 192 predicate places. [2024-06-27 23:01:47,474 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 166 transitions, 2200 flow [2024-06-27 23:01:47,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:47,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:47,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:01:47,475 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:47,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash 982582997, now seen corresponding path program 1 times [2024-06-27 23:01:47,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:47,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468431509] [2024-06-27 23:01:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:47,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:48,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468431509] [2024-06-27 23:01:48,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468431509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:48,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:48,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 23:01:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264662957] [2024-06-27 23:01:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:48,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 23:01:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 23:01:48,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 23:01:48,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:48,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 166 transitions, 2200 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:48,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:48,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:48,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:49,279 INFO L124 PetriNetUnfolderBase]: 533/1159 cut-off events. [2024-06-27 23:01:49,280 INFO L125 PetriNetUnfolderBase]: For 41958/41958 co-relation queries the response was YES. [2024-06-27 23:01:49,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6905 conditions, 1159 events. 533/1159 cut-off events. For 41958/41958 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7541 event pairs, 127 based on Foata normal form. 6/1163 useless extension candidates. Maximal degree in co-relation 6819. Up to 919 conditions per place. [2024-06-27 23:01:49,288 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 136 selfloop transitions, 29 changer transitions 16/185 dead transitions. [2024-06-27 23:01:49,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 185 transitions, 2644 flow [2024-06-27 23:01:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 23:01:49,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-27 23:01:49,289 INFO L175 Difference]: Start difference. First operand has 223 places, 166 transitions, 2200 flow. Second operand 11 states and 137 transitions. [2024-06-27 23:01:49,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 185 transitions, 2644 flow [2024-06-27 23:01:49,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 185 transitions, 2596 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:49,407 INFO L231 Difference]: Finished difference. Result has 226 places, 160 transitions, 2121 flow [2024-06-27 23:01:49,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2121, PETRI_PLACES=226, PETRI_TRANSITIONS=160} [2024-06-27 23:01:49,408 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2024-06-27 23:01:49,408 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 160 transitions, 2121 flow [2024-06-27 23:01:49,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:49,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:49,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:01:49,409 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:49,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1378332407, now seen corresponding path program 2 times [2024-06-27 23:01:49,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:49,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099981361] [2024-06-27 23:01:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:50,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099981361] [2024-06-27 23:01:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099981361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:50,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:50,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309202126] [2024-06-27 23:01:50,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:50,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:50,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:50,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:50,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 160 transitions, 2121 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:50,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:50,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:50,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:50,818 INFO L124 PetriNetUnfolderBase]: 509/1113 cut-off events. [2024-06-27 23:01:50,819 INFO L125 PetriNetUnfolderBase]: For 38262/38262 co-relation queries the response was YES. [2024-06-27 23:01:50,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 1113 events. 509/1113 cut-off events. For 38262/38262 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7162 event pairs, 95 based on Foata normal form. 6/1119 useless extension candidates. Maximal degree in co-relation 6515. Up to 759 conditions per place. [2024-06-27 23:01:50,828 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 114 selfloop transitions, 10 changer transitions 49/177 dead transitions. [2024-06-27 23:01:50,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 177 transitions, 2521 flow [2024-06-27 23:01:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-27 23:01:50,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 23:01:50,829 INFO L175 Difference]: Start difference. First operand has 226 places, 160 transitions, 2121 flow. Second operand 10 states and 119 transitions. [2024-06-27 23:01:50,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 177 transitions, 2521 flow [2024-06-27 23:01:50,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 177 transitions, 2445 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-27 23:01:50,958 INFO L231 Difference]: Finished difference. Result has 220 places, 124 transitions, 1532 flow [2024-06-27 23:01:50,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1532, PETRI_PLACES=220, PETRI_TRANSITIONS=124} [2024-06-27 23:01:50,959 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 189 predicate places. [2024-06-27 23:01:50,959 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 124 transitions, 1532 flow [2024-06-27 23:01:50,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:50,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:50,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:50,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:01:50,959 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:50,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash -862294989, now seen corresponding path program 3 times [2024-06-27 23:01:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232244293] [2024-06-27 23:01:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:51,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:51,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232244293] [2024-06-27 23:01:51,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232244293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:51,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:51,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 23:01:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029636664] [2024-06-27 23:01:51,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 23:01:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 23:01:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 23:01:52,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 23:01:52,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 124 transitions, 1532 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:52,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:52,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 23:01:52,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:52,379 INFO L124 PetriNetUnfolderBase]: 391/854 cut-off events. [2024-06-27 23:01:52,380 INFO L125 PetriNetUnfolderBase]: For 29219/29219 co-relation queries the response was YES. [2024-06-27 23:01:52,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4914 conditions, 854 events. 391/854 cut-off events. For 29219/29219 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5066 event pairs, 82 based on Foata normal form. 6/860 useless extension candidates. Maximal degree in co-relation 4830. Up to 619 conditions per place. [2024-06-27 23:01:52,385 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 89 selfloop transitions, 26 changer transitions 19/138 dead transitions. [2024-06-27 23:01:52,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 138 transitions, 1846 flow [2024-06-27 23:01:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-27 23:01:52,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-27 23:01:52,386 INFO L175 Difference]: Start difference. First operand has 220 places, 124 transitions, 1532 flow. Second operand 10 states and 118 transitions. [2024-06-27 23:01:52,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 138 transitions, 1846 flow [2024-06-27 23:01:52,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 138 transitions, 1654 flow, removed 8 selfloop flow, removed 31 redundant places. [2024-06-27 23:01:52,452 INFO L231 Difference]: Finished difference. Result has 184 places, 113 transitions, 1287 flow [2024-06-27 23:01:52,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1287, PETRI_PLACES=184, PETRI_TRANSITIONS=113} [2024-06-27 23:01:52,453 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-06-27 23:01:52,453 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 113 transitions, 1287 flow [2024-06-27 23:01:52,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:52,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:52,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:01:52,453 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:52,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash -855801481, now seen corresponding path program 1 times [2024-06-27 23:01:52,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:52,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122308244] [2024-06-27 23:01:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:52,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:53,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122308244] [2024-06-27 23:01:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122308244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 23:01:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659008426] [2024-06-27 23:01:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 23:01:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 23:01:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 23:01:53,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:53,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 113 transitions, 1287 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:53,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:53,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:53,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:54,263 INFO L124 PetriNetUnfolderBase]: 350/775 cut-off events. [2024-06-27 23:01:54,263 INFO L125 PetriNetUnfolderBase]: For 21988/21988 co-relation queries the response was YES. [2024-06-27 23:01:54,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4194 conditions, 775 events. 350/775 cut-off events. For 21988/21988 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4483 event pairs, 81 based on Foata normal form. 6/781 useless extension candidates. Maximal degree in co-relation 4122. Up to 436 conditions per place. [2024-06-27 23:01:54,268 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 86 selfloop transitions, 38 changer transitions 6/134 dead transitions. [2024-06-27 23:01:54,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 134 transitions, 1739 flow [2024-06-27 23:01:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-27 23:01:54,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-27 23:01:54,269 INFO L175 Difference]: Start difference. First operand has 184 places, 113 transitions, 1287 flow. Second operand 11 states and 141 transitions. [2024-06-27 23:01:54,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 134 transitions, 1739 flow [2024-06-27 23:01:54,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 134 transitions, 1654 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 23:01:54,314 INFO L231 Difference]: Finished difference. Result has 174 places, 111 transitions, 1274 flow [2024-06-27 23:01:54,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1274, PETRI_PLACES=174, PETRI_TRANSITIONS=111} [2024-06-27 23:01:54,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 143 predicate places. [2024-06-27 23:01:54,315 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 111 transitions, 1274 flow [2024-06-27 23:01:54,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:54,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:54,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:54,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:01:54,316 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:54,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -509306345, now seen corresponding path program 4 times [2024-06-27 23:01:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382218306] [2024-06-27 23:01:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:54,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382218306] [2024-06-27 23:01:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382218306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:55,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434982313] [2024-06-27 23:01:55,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:55,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:55,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:55,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:55,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:55,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 111 transitions, 1274 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:55,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:55,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:56,218 INFO L124 PetriNetUnfolderBase]: 331/732 cut-off events. [2024-06-27 23:01:56,219 INFO L125 PetriNetUnfolderBase]: For 15409/15409 co-relation queries the response was YES. [2024-06-27 23:01:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3777 conditions, 732 events. 331/732 cut-off events. For 15409/15409 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4162 event pairs, 62 based on Foata normal form. 6/738 useless extension candidates. Maximal degree in co-relation 3708. Up to 436 conditions per place. [2024-06-27 23:01:56,223 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 72 selfloop transitions, 12 changer transitions 42/130 dead transitions. [2024-06-27 23:01:56,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 130 transitions, 1632 flow [2024-06-27 23:01:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 23:01:56,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 23:01:56,224 INFO L175 Difference]: Start difference. First operand has 174 places, 111 transitions, 1274 flow. Second operand 10 states and 130 transitions. [2024-06-27 23:01:56,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 130 transitions, 1632 flow [2024-06-27 23:01:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 130 transitions, 1526 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 23:01:56,255 INFO L231 Difference]: Finished difference. Result has 172 places, 82 transitions, 816 flow [2024-06-27 23:01:56,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=816, PETRI_PLACES=172, PETRI_TRANSITIONS=82} [2024-06-27 23:01:56,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-06-27 23:01:56,256 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 82 transitions, 816 flow [2024-06-27 23:01:56,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:01:56,256 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1197824313, now seen corresponding path program 5 times [2024-06-27 23:01:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956389983] [2024-06-27 23:01:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:57,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956389983] [2024-06-27 23:01:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956389983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:57,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:57,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:01:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520876351] [2024-06-27 23:01:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:57,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:01:57,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:01:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:01:57,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:01:57,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 82 transitions, 816 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:57,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:01:57,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:57,683 INFO L124 PetriNetUnfolderBase]: 248/560 cut-off events. [2024-06-27 23:01:57,683 INFO L125 PetriNetUnfolderBase]: For 18349/18349 co-relation queries the response was YES. [2024-06-27 23:01:57,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 560 events. 248/560 cut-off events. For 18349/18349 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3038 event pairs, 50 based on Foata normal form. 12/572 useless extension candidates. Maximal degree in co-relation 2571. Up to 384 conditions per place. [2024-06-27 23:01:57,686 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 56 selfloop transitions, 2 changer transitions 37/100 dead transitions. [2024-06-27 23:01:57,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 100 transitions, 1084 flow [2024-06-27 23:01:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-27 23:01:57,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 23:01:57,687 INFO L175 Difference]: Start difference. First operand has 172 places, 82 transitions, 816 flow. Second operand 10 states and 138 transitions. [2024-06-27 23:01:57,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 100 transitions, 1084 flow [2024-06-27 23:01:57,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 100 transitions, 881 flow, removed 23 selfloop flow, removed 31 redundant places. [2024-06-27 23:01:57,713 INFO L231 Difference]: Finished difference. Result has 140 places, 62 transitions, 467 flow [2024-06-27 23:01:57,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=467, PETRI_PLACES=140, PETRI_TRANSITIONS=62} [2024-06-27 23:01:57,713 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 109 predicate places. [2024-06-27 23:01:57,713 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 62 transitions, 467 flow [2024-06-27 23:01:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:57,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:01:57,714 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:57,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -772287493, now seen corresponding path program 2 times [2024-06-27 23:01:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498843468] [2024-06-27 23:01:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498843468] [2024-06-27 23:01:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498843468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 23:01:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628229164] [2024-06-27 23:01:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 23:01:59,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 23:01:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 23:01:59,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:01:59,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 62 transitions, 467 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:01:59,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:59,443 INFO L124 PetriNetUnfolderBase]: 220/503 cut-off events. [2024-06-27 23:01:59,443 INFO L125 PetriNetUnfolderBase]: For 14016/14016 co-relation queries the response was YES. [2024-06-27 23:01:59,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332 conditions, 503 events. 220/503 cut-off events. For 14016/14016 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2750 event pairs, 55 based on Foata normal form. 6/509 useless extension candidates. Maximal degree in co-relation 2273. Up to 277 conditions per place. [2024-06-27 23:01:59,446 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 53 selfloop transitions, 20 changer transitions 3/80 dead transitions. [2024-06-27 23:01:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 80 transitions, 775 flow [2024-06-27 23:01:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 23:01:59,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-27 23:01:59,447 INFO L175 Difference]: Start difference. First operand has 140 places, 62 transitions, 467 flow. Second operand 11 states and 137 transitions. [2024-06-27 23:01:59,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 80 transitions, 775 flow [2024-06-27 23:01:59,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 80 transitions, 694 flow, removed 34 selfloop flow, removed 16 redundant places. [2024-06-27 23:01:59,463 INFO L231 Difference]: Finished difference. Result has 114 places, 62 transitions, 478 flow [2024-06-27 23:01:59,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=478, PETRI_PLACES=114, PETRI_TRANSITIONS=62} [2024-06-27 23:01:59,463 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-27 23:01:59,463 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 62 transitions, 478 flow [2024-06-27 23:01:59,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:01:59,464 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:01:59,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1885107099, now seen corresponding path program 6 times [2024-06-27 23:01:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645162201] [2024-06-27 23:01:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645162201] [2024-06-27 23:02:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645162201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:00,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:00,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:02:00,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259315094] [2024-06-27 23:02:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:02:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:02:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:02:00,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:02:00,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 62 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:00,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:02:00,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:00,712 INFO L124 PetriNetUnfolderBase]: 207/472 cut-off events. [2024-06-27 23:02:00,712 INFO L125 PetriNetUnfolderBase]: For 5853/5853 co-relation queries the response was YES. [2024-06-27 23:02:00,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 472 events. 207/472 cut-off events. For 5853/5853 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2519 event pairs, 48 based on Foata normal form. 6/478 useless extension candidates. Maximal degree in co-relation 1851. Up to 277 conditions per place. [2024-06-27 23:02:00,714 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 39 selfloop transitions, 11 changer transitions 20/75 dead transitions. [2024-06-27 23:02:00,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 75 transitions, 666 flow [2024-06-27 23:02:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:02:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:02:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 23:02:00,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-27 23:02:00,715 INFO L175 Difference]: Start difference. First operand has 114 places, 62 transitions, 478 flow. Second operand 9 states and 125 transitions. [2024-06-27 23:02:00,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 75 transitions, 666 flow [2024-06-27 23:02:00,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 75 transitions, 620 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 23:02:00,724 INFO L231 Difference]: Finished difference. Result has 115 places, 51 transitions, 372 flow [2024-06-27 23:02:00,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=372, PETRI_PLACES=115, PETRI_TRANSITIONS=51} [2024-06-27 23:02:00,725 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-27 23:02:00,725 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 51 transitions, 372 flow [2024-06-27 23:02:00,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:00,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:02:00,725 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:02:00,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1439530757, now seen corresponding path program 3 times [2024-06-27 23:02:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76118337] [2024-06-27 23:02:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:01,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:01,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76118337] [2024-06-27 23:02:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76118337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:01,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:01,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 23:02:01,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667786880] [2024-06-27 23:02:01,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:01,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 23:02:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 23:02:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 23:02:02,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:02:02,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 51 transitions, 372 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:02,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:02:02,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:02,302 INFO L124 PetriNetUnfolderBase]: 167/382 cut-off events. [2024-06-27 23:02:02,302 INFO L125 PetriNetUnfolderBase]: For 5637/5637 co-relation queries the response was YES. [2024-06-27 23:02:02,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 382 events. 167/382 cut-off events. For 5637/5637 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1916 event pairs, 38 based on Foata normal form. 6/388 useless extension candidates. Maximal degree in co-relation 1485. Up to 255 conditions per place. [2024-06-27 23:02:02,304 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 39 selfloop transitions, 19 changer transitions 6/68 dead transitions. [2024-06-27 23:02:02,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 68 transitions, 579 flow [2024-06-27 23:02:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:02:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:02:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-27 23:02:02,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 23:02:02,305 INFO L175 Difference]: Start difference. First operand has 115 places, 51 transitions, 372 flow. Second operand 11 states and 132 transitions. [2024-06-27 23:02:02,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 68 transitions, 579 flow [2024-06-27 23:02:02,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 68 transitions, 518 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-06-27 23:02:02,311 INFO L231 Difference]: Finished difference. Result has 101 places, 52 transitions, 373 flow [2024-06-27 23:02:02,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=373, PETRI_PLACES=101, PETRI_TRANSITIONS=52} [2024-06-27 23:02:02,320 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 70 predicate places. [2024-06-27 23:02:02,321 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 52 transitions, 373 flow [2024-06-27 23:02:02,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:02,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:02,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:02:02,321 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:02:02,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1942065005, now seen corresponding path program 4 times [2024-06-27 23:02:02,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:02,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394625777] [2024-06-27 23:02:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:02,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:03,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:03,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394625777] [2024-06-27 23:02:03,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394625777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:03,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:03,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:02:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144533901] [2024-06-27 23:02:03,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:02:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:02:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:02:03,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:02:03,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 52 transitions, 373 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:03,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:03,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:02:03,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:03,816 INFO L124 PetriNetUnfolderBase]: 164/387 cut-off events. [2024-06-27 23:02:03,816 INFO L125 PetriNetUnfolderBase]: For 4741/4741 co-relation queries the response was YES. [2024-06-27 23:02:03,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 387 events. 164/387 cut-off events. For 4741/4741 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2004 event pairs, 25 based on Foata normal form. 6/391 useless extension candidates. Maximal degree in co-relation 1485. Up to 157 conditions per place. [2024-06-27 23:02:03,817 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 40 selfloop transitions, 16 changer transitions 10/71 dead transitions. [2024-06-27 23:02:03,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 71 transitions, 605 flow [2024-06-27 23:02:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:02:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:02:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-27 23:02:03,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 23:02:03,819 INFO L175 Difference]: Start difference. First operand has 101 places, 52 transitions, 373 flow. Second operand 11 states and 148 transitions. [2024-06-27 23:02:03,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 71 transitions, 605 flow [2024-06-27 23:02:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 71 transitions, 567 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 23:02:03,825 INFO L231 Difference]: Finished difference. Result has 103 places, 48 transitions, 342 flow [2024-06-27 23:02:03,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=342, PETRI_PLACES=103, PETRI_TRANSITIONS=48} [2024-06-27 23:02:03,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-06-27 23:02:03,826 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 48 transitions, 342 flow [2024-06-27 23:02:03,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:03,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:03,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:02:03,826 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:02:03,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1942361675, now seen corresponding path program 5 times [2024-06-27 23:02:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:03,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102511492] [2024-06-27 23:02:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:05,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:05,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102511492] [2024-06-27 23:02:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102511492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:05,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 23:02:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701745976] [2024-06-27 23:02:05,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:05,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 23:02:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 23:02:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 23:02:05,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:02:05,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 48 transitions, 342 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:05,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:05,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:02:05,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:05,372 INFO L124 PetriNetUnfolderBase]: 133/318 cut-off events. [2024-06-27 23:02:05,373 INFO L125 PetriNetUnfolderBase]: For 3769/3769 co-relation queries the response was YES. [2024-06-27 23:02:05,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 318 events. 133/318 cut-off events. For 3769/3769 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1510 event pairs, 20 based on Foata normal form. 6/322 useless extension candidates. Maximal degree in co-relation 1187. Up to 157 conditions per place. [2024-06-27 23:02:05,374 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 30 selfloop transitions, 14 changer transitions 15/63 dead transitions. [2024-06-27 23:02:05,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 63 transitions, 498 flow [2024-06-27 23:02:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:02:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:02:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-27 23:02:05,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-27 23:02:05,381 INFO L175 Difference]: Start difference. First operand has 103 places, 48 transitions, 342 flow. Second operand 12 states and 141 transitions. [2024-06-27 23:02:05,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 63 transitions, 498 flow [2024-06-27 23:02:05,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 63 transitions, 463 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 23:02:05,387 INFO L231 Difference]: Finished difference. Result has 102 places, 43 transitions, 302 flow [2024-06-27 23:02:05,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=302, PETRI_PLACES=102, PETRI_TRANSITIONS=43} [2024-06-27 23:02:05,387 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-27 23:02:05,387 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 43 transitions, 302 flow [2024-06-27 23:02:05,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:05,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:05,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:02:05,388 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:02:05,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2118583717, now seen corresponding path program 6 times [2024-06-27 23:02:05,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:05,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703701465] [2024-06-27 23:02:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:05,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:06,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:06,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703701465] [2024-06-27 23:02:06,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703701465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:06,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:06,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:02:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525957165] [2024-06-27 23:02:06,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:02:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:02:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:02:06,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 23:02:06,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 43 transitions, 302 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:06,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:06,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 23:02:06,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:07,133 INFO L124 PetriNetUnfolderBase]: 93/238 cut-off events. [2024-06-27 23:02:07,133 INFO L125 PetriNetUnfolderBase]: For 3812/3812 co-relation queries the response was YES. [2024-06-27 23:02:07,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 238 events. 93/238 cut-off events. For 3812/3812 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1032 event pairs, 20 based on Foata normal form. 12/248 useless extension candidates. Maximal degree in co-relation 815. Up to 67 conditions per place. [2024-06-27 23:02:07,135 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 19 selfloop transitions, 5 changer transitions 29/58 dead transitions. [2024-06-27 23:02:07,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 58 transitions, 454 flow [2024-06-27 23:02:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:02:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:02:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-27 23:02:07,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 23:02:07,136 INFO L175 Difference]: Start difference. First operand has 102 places, 43 transitions, 302 flow. Second operand 10 states and 135 transitions. [2024-06-27 23:02:07,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 58 transitions, 454 flow [2024-06-27 23:02:07,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 58 transitions, 416 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 23:02:07,140 INFO L231 Difference]: Finished difference. Result has 94 places, 26 transitions, 174 flow [2024-06-27 23:02:07,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=174, PETRI_PLACES=94, PETRI_TRANSITIONS=26} [2024-06-27 23:02:07,140 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2024-06-27 23:02:07,140 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 26 transitions, 174 flow [2024-06-27 23:02:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:07,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:07,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:07,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:02:07,141 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:02:07,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash -900917661, now seen corresponding path program 1 times [2024-06-27 23:02:07,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81035309] [2024-06-27 23:02:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:07,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81035309] [2024-06-27 23:02:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81035309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:08,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 23:02:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820504447] [2024-06-27 23:02:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 23:02:08,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 23:02:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 23:02:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 23:02:08,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 26 transitions, 174 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 23:02:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:09,225 INFO L124 PetriNetUnfolderBase]: 21/66 cut-off events. [2024-06-27 23:02:09,225 INFO L125 PetriNetUnfolderBase]: For 880/880 co-relation queries the response was YES. [2024-06-27 23:02:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 66 events. 21/66 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 4 based on Foata normal form. 4/68 useless extension candidates. Maximal degree in co-relation 211. Up to 22 conditions per place. [2024-06-27 23:02:09,226 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2024-06-27 23:02:09,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 32 transitions, 202 flow [2024-06-27 23:02:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:02:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:02:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-27 23:02:09,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2024-06-27 23:02:09,229 INFO L175 Difference]: Start difference. First operand has 94 places, 26 transitions, 174 flow. Second operand 11 states and 115 transitions. [2024-06-27 23:02:09,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 32 transitions, 202 flow [2024-06-27 23:02:09,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 32 transitions, 147 flow, removed 5 selfloop flow, removed 21 redundant places. [2024-06-27 23:02:09,230 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2024-06-27 23:02:09,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2024-06-27 23:02:09,230 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-06-27 23:02:09,230 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2024-06-27 23:02:09,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:09,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 23:02:09,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 23:02:09,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 23:02:09,245 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 23:02:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:02:09,245 INFO L445 BasicCegarLoop]: Path program histogram: [14, 12, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:09,247 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 23:02:09,247 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 23:02:09,250 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 23:02:09,250 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 23:02:09,251 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 11:02:09 BasicIcfg [2024-06-27 23:02:09,251 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 23:02:09,251 INFO L158 Benchmark]: Toolchain (without parser) took 105729.95ms. Allocated memory was 155.2MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 76.8MB in the beginning and 608.5MB in the end (delta: -531.7MB). Peak memory consumption was 808.9MB. Max. memory is 16.1GB. [2024-06-27 23:02:09,251 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory was 107.4MB in the beginning and 107.2MB in the end (delta: 241.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:02:09,251 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 155.2MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:02:09,251 INFO L158 Benchmark]: CACSL2BoogieTranslator took 620.21ms. Allocated memory was 155.2MB in the beginning and 203.4MB in the end (delta: 48.2MB). Free memory was 76.6MB in the beginning and 157.7MB in the end (delta: -81.1MB). Peak memory consumption was 25.5MB. Max. memory is 16.1GB. [2024-06-27 23:02:09,252 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.50ms. Allocated memory is still 203.4MB. Free memory was 157.7MB in the beginning and 154.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 23:02:09,252 INFO L158 Benchmark]: Boogie Preprocessor took 55.21ms. Allocated memory is still 203.4MB. Free memory was 154.5MB in the beginning and 150.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 23:02:09,252 INFO L158 Benchmark]: RCFGBuilder took 711.66ms. Allocated memory is still 203.4MB. Free memory was 150.4MB in the beginning and 84.3MB in the end (delta: 66.1MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2024-06-27 23:02:09,252 INFO L158 Benchmark]: TraceAbstraction took 104271.24ms. Allocated memory was 203.4MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 83.2MB in the beginning and 608.5MB in the end (delta: -525.2MB). Peak memory consumption was 764.5MB. Max. memory is 16.1GB. [2024-06-27 23:02:09,256 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory was 107.4MB in the beginning and 107.2MB in the end (delta: 241.3kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 155.2MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 620.21ms. Allocated memory was 155.2MB in the beginning and 203.4MB in the end (delta: 48.2MB). Free memory was 76.6MB in the beginning and 157.7MB in the end (delta: -81.1MB). Peak memory consumption was 25.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.50ms. Allocated memory is still 203.4MB. Free memory was 157.7MB in the beginning and 154.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.21ms. Allocated memory is still 203.4MB. Free memory was 154.5MB in the beginning and 150.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 711.66ms. Allocated memory is still 203.4MB. Free memory was 150.4MB in the beginning and 84.3MB in the end (delta: 66.1MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * TraceAbstraction took 104271.24ms. Allocated memory was 203.4MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 83.2MB in the beginning and 608.5MB in the end (delta: -525.2MB). Peak memory consumption was 764.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 839]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 840]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 52 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 104.2s, OverallIterations: 100, TraceHistogramMax: 1, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 39.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3520 SdHoareTripleChecker+Valid, 16.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2945 mSDsluCounter, 1935 SdHoareTripleChecker+Invalid, 14.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1626 mSDsCounter, 1475 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23506 IncrementalHoareTripleChecker+Invalid, 24981 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1475 mSolverCounterUnsat, 309 mSDtfsCounter, 23506 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 842 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2670occurred in iteration=72, InterpolantAutomatonStates: 828, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 62.2s InterpolantComputationTime, 1530 NumberOfCodeBlocks, 1530 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1430 ConstructedInterpolants, 0 QuantifiedInterpolants, 38435 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 100 InterpolantComputations, 100 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 23:02:09,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE